Q: Is 21,121,220 a Composite Number?

 A: Yes, 21,121,220 is a composite number.

Why is 21,121,220 a composite number?

A composite number is a number that can be divided evenly by more numbers than 1 and itself. It is the opposite of a prime number.

The number 21,121,220 can be evenly divided by 1 2 4 5 10 20 1,056,061 2,112,122 4,224,244 5,280,305 10,560,610 and 21,121,220, with no remainder.

Since 21,121,220 cannot be divided by just 1 and 21,121,220, it is a composite number.


More Examples

Number 21,121,21821,121,21921,121,22121,121,222
Composite? yesyesyesyes
  • All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).

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