Q: Is 21,711 a Prime Number?
A: No, 21,711 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 21711 can be evenly divided by 1 3 7,237 and 21,711, with no remainder.
Since 21,711 cannot be divided by just 1 and 21,711, it is not a prime number.