Is 121 a Prime Number?
Is 121 prime?
No
121 = 11² (divisible by 11).
Why
121 is composite because it is divisible by 11 (121 = 11²), so it has factors other than 1 and itself.
A prime number is a whole number greater than 1 whose only factors are 1 and itself. To check 121, test whether any prime up to √121 divides it evenly — if none do, it is prime.
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The prime factorization calculator tests any number and shows its prime factors and all divisors.
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Frequently asked questions
Is 121 a prime number?+
No, 121 is composite because it is divisible by 11 (121 = 11²), so it has factors other than 1 and itself.
What is 121 divisible by?+
121 is divisible by more than just 1 and itself. Its prime factorization is 121 = 11².