Q: Is 21,188 a Prime Number?
A: No, 21,188 is 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 21188 can be evenly divided by 1 2 4 5,297 10,594 and 21,188, with no remainder.
Since 21,188 cannot be divided by just 1 and 21,188, it is not a prime number.