It's about one-third as heavy as a Light Bulb
In other words, the weight of a Light Bulb is 2.90 times 0.0000000000120 megatonnes.(a.k.a. lamp) (for A19-size, 60w, incandescent bulb by Bulbrite; package weight)
A standard, sixty-watt light bulb weighs about 0.0000000000340 megatonnes. The tightly-coiled filament inside a bulb of this size would measure about 579mm if uncoiled and stretched out.
It's about three times as heavy as a Die (Dice)
In other words, 0.0000000000120 megatonnes is 2.90 times the weight of a Die (Dice), and the weight of a Die (Dice) is 0.340 times that amount.(for six-sided, 16 mm, rounded cube)
A die, of the size most commonly used in board games and casinos, typically weight 0.00000000000410 megatonnes. The use of dice and dice-like tools predates written history, with the oldest known examples belonging to a 5,000-year old backgammon set uncovered during an archaeological dig in modern-day Iran.
It's about one-fourth as heavy as a Golf Ball
In other words, 0.0000000000120 megatonnes is 0.26130 times the weight of a Golf Ball, and the weight of a Golf Ball is 3.8270 times that amount.(per R&A USGA Rules of Golf; maximum rule weight)
According to the Rules of Golf (as approved by the United States Golf Association and the Rules Committee of the Royal and Ancient Golf Club of Saint Andrews), golf balls must weigh no more than 0.000000000045930 megatonnes. Golf balls are not required to have the familiar dimpled pattern, but the design has been popular since its invention in 1905 because it reduces drag while increasing lift.
It's about five times as heavy as a Penny
In other words, 0.0000000000120 megatonnes is 4.80 times the weight of a Penny, and the weight of a Penny is 0.210 times that amount.(United States) (formally one-cent coin) (Union shield design, 2010-present)
The weight of a United States penny is 0.00000000000250 megatonnes. According to a 2010 report by the United States Mint, the cost of manufacturing and distributing a penny is $0.0179 — more than its face-value.
It's about one-fifth as heavy as a Tennis Ball
In other words, 0.0000000000120 megatonnes is 0.2080 times the weight of a Tennis Ball, and the weight of a Tennis Ball is 4.810 times that amount.(ITF Standard; for Type 2 ball)
Per International Tennis Federation standard, regulation tennis balls must weigh about 0.00000000005770 megatonnes. Competition balls are also tested for bounce height, with the standards requiring that a ball dropped from 254 cm must bounce back to a height of 135 cm to 147 cm.
It's about one-fifth as heavy as a Battery (C)
In other words, 0.0000000000120 megatonnes is 0.180 times the weight of a Battery (C), and the weight of a Battery (C) is 5.60 times that amount.(Alkaline)
A "C" size battery weighs 0.0000000000650 megatonnes. C batteries are typically used in medium-drain devices such as musical instruments.
It's about six-and-a-half times as heavy as a Playing Card
In other words, the weight of a Playing Card is 0.150 times 0.0000000000120 megatonnes.(ISO 216 B8 size, 2.5" x 3.5")
A single ISO 216 B8-size playing card weighs 0.00000000000180 megatonnes. Although this size is the most common home playing card, many casinos use "bridge size" cards — 2,640 sq. mm (4.036 sq. in) smaller in area.