121121242 has 12 divisors (see below), whose sum is σ = 199700298. Its totient is φ = 55055000.

The previous prime is 121121237. The next prime is 121121249. The reversal of 121121242 is 242121121.

It can be written as a sum of positive squares in only one way, i.e., 95628841 + 25492401 = 9779^2 + 5049^2 .

It is a super-3 number, since 3×121121242³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (121121249) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 250009 + ... + 250492.

Almost surely, 2^121121242 is an apocalyptic number.

121121242 is a deficient number, since it is larger than the sum of its proper divisors (78579056).

121121242 is a wasteful number, since it uses less digits than its factorization.

121121242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500525 (or 500514 counting only the distinct ones).

The product of its digits is 64, while the sum is 16.

The square root of 121121242 is about 11005.5096201857. The cubic root of 121121242 is about 494.7738884996.

Adding to 121121242 its reverse (242121121), we get a palindrome (363242363).

The spelling of 121121242 in words is "one hundred twenty-one million, one hundred twenty-one thousand, two hundred forty-two".