121333131 has 24 divisors (see below), whose sum is σ = 186432480. Its totient is φ = 75776256.

The previous prime is 121333111. The next prime is 121333139. The reversal of 121333131 is 131333121.

It is a happy number.

It is not a de Polignac number, because 121333131 - 2⁹ = 121332619 is a prime.

It is a super-2 number, since 2×121333131² = 29443457356526322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121333139) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33306 + ... + 36768.

It is an arithmetic number, because the mean of its divisors is an integer number (7768020).

Almost surely, 2^121333131 is an apocalyptic number.

121333131 is a deficient number, since it is larger than the sum of its proper divisors (65099349).

121333131 is a wasteful number, since it uses less digits than its factorization.

121333131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3715 (or 3712 counting only the distinct ones).

The product of its digits is 162, while the sum is 18.

The square root of 121333131 is about 11015.1319102406. The cubic root of 121333131 is about 495.0622388836.

Adding to 121333131 its reverse (131333121), we get a palindrome (252666252).

The spelling of 121333131 in words is "one hundred twenty-one million, three hundred thirty-three thousand, one hundred thirty-one".