12113111331 has 16 divisors (see below), whose sum is σ = 18327168000. Its totient is φ = 7903589544.

The previous prime is 12113111293. The next prime is 12113111333. The reversal of 12113111331 is 13311131121.

12113111331 is a `hidden beast` number, since 1 + 21 + 1 + 311 + 1 + 331 = 666.

It is not a de Polignac number, because 12113111331 - 2⁶ = 12113111267 is a prime.

It is a super-2 number, since 2×12113111331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12113111333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4771431 + ... + 4773968.

It is an arithmetic number, because the mean of its divisors is an integer number (1145448000).

Almost surely, 2^12113111331 is an apocalyptic number.

12113111331 is a deficient number, since it is larger than the sum of its proper divisors (6214056669).

12113111331 is an equidigital number, since it uses as much as digits as its factorization.

12113111331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9545455 (or 9545449 counting only the distinct ones).

The product of its digits is 54, while the sum is 18.

Adding to 12113111331 its reverse (13311131121), we get a palindrome (25424242452).

The spelling of 12113111331 in words is "twelve billion, one hundred thirteen million, one hundred eleven thousand, three hundred thirty-one".