12121310331 has 48 divisors (see below), whose sum is σ = 19164748512. Its totient is φ = 7337433600.

The previous prime is 12121310309. The next prime is 12121310359. The reversal of 12121310331 is 13301312121.

12121310331 is a `hidden beast` number, since 1 + 2 + 1 + 21 + 310 + 331 = 666.

It is not a de Polignac number, because 12121310331 - 2⁷ = 12121310203 is a prime.

It is a super-2 number, since 2×12121310331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12121315331) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3594076 + ... + 3597446.

It is an arithmetic number, because the mean of its divisors is an integer number (399265594).

Almost surely, 2^12121310331 is an apocalyptic number.

12121310331 is a deficient number, since it is larger than the sum of its proper divisors (7043438181).

12121310331 is a wasteful number, since it uses less digits than its factorization.

12121310331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3884 (or 3881 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 12121310331 its reverse (13301312121), we get a palindrome (25422622452).

The spelling of 12121310331 in words is "twelve billion, one hundred twenty-one million, three hundred ten thousand, three hundred thirty-one".