Q: Is 21,120,013 a Prime Number?

 A: No, 21,120,013 is not a prime number.

Why is 21,120,013 not a prime number?

A prime number is a natural number, greater than one, that can only be divided by 1 and itself.

The number 21120013 can be evenly divided by 1 173 122,081 and 21,120,013, with no remainder.

Since 21,120,013 cannot be divided by just 1 and 21,120,013, it is not a prime number.


More Examples

Number 21,120,01121,120,01221,120,01421,120,015
Prime? nononono
  • All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).

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