Q: Is 21,166 a Prime Number?
A: No, 21,166 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 21166 can be evenly divided by 1 2 19 38 557 1,114 10,583 and 21,166, with no remainder.
Since 21,166 cannot be divided by just 1 and 21,166, it is not a prime number.