To determine if 2121 is a prime number or a composite number, we simply look at the factors for 2121.
If the factors of 2121 are only 2121 and 1, then we know that 2121 is a prime number. Otherwise, 2121 is a composite number.
To explain better, if 2121 is only divisible by 1 and 2121, then it is a prime number, and if 2121 is divisible by more than 2121 and 1, then it is a composite number.
The factors of 2121 are as follows:
1, 3, 7, 21, 101, 303, 707, 2121
Therefore, since 2121 is divisible by more than one and itself, the answer to the
question "Is 2121 prime or composite?" is highlighted in blue below.
composite
Is 2122 prime or composite?
OK. Now you know that 2121 is a composite number. Use our logic above and see if
you can figure out if the next number on our list is prime or composite before you check your answer.
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