Is 121 a prime number? Prealgebra Factors and Multiples Prime Numbers 1 Answer smendyka Mar 6, 2018 #11 xx 11 = 121# Therefore, 121 is not a prime number. Answer link Related questions Are prime numbers infinite? Is 81 a prime number? Is 0 and 1 a prime number? What are prime numbers? Is 89 a prime number? Is 10 a prime number? Is 69 a prime number? What is a co-prime number? Is 35 a prime number? Is 42 a prime number? See all questions in Prime Numbers Impact of this question 3114 views around the world You can reuse this answer Creative Commons License