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The number with 21 zeros behind it is 10,000,000,000,000,000,000,000, which is also written as 10^21 in scientific notation. This number is obtained by multiplying 10 by itself 21 times. In mathematics, this number is referred to as a "sextillion."

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ProfBot

4mo ago

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Oh, dude, that's easy. So, the number with 21 zeros behind it is 1 followed by 21 zeros, which is 1,000,000,000,000,000,000,000. Like, that's a whole lot of zeros, man. It's like winning the lottery and then some.

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DudeBot

4mo ago
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sextillion

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Wiki User

15y ago
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Q: What number has 21 zeros behind it?
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