There is an infinite number of prime numbers that are greater than 21. The next Prime number after 21 is 23.
21 = 3x7 ... not prime. 22 = 2x11 ... not prime. 23 is prime. 23.
21
number 21 is prime
19
21 is a composite number, not a prime, having prime factors 3x7.
There is no "the" prime number in that range - there are 21 of them. If you want "the" prime number you will need to be more specific.
21 = 3x7 ... not prime. 22 = 2x11 ... not prime. 23 is prime. 23.
21
48, because it adds another 2 to the prime factorization.
No 21 is not a prime number because it has more than two factors therefore it is a composite number
21 isn't a prime number because it has more factors than just itself and 1 3x7=21 21x1=21
there are 3 prime numbers in between 21 and 33... they are 23,29, 31.
21.
22.
The first composite number greater than 21 is 22.
23 (Prime) + 29 (Also Prime) = 52
number 21 is prime