Q: Is 21,361 a Prime Number?
A: No, 21,361 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 21361 can be evenly divided by 1 41 521 and 21,361, with no remainder.
Since 21,361 cannot be divided by just 1 and 21,361, it is not a prime number.