12320311131 has 6 divisors (see below), whose sum is σ = 17796004980. Its totient is φ = 8213540748.

The previous prime is 12320311127. The next prime is 12320311163. The reversal of 12320311131 is 13111302321.

12320311131 is a `hidden beast` number, since 1 + 2 + 320 + 311 + 1 + 31 = 666.

It is not a de Polignac number, because 12320311131 - 2² = 12320311127 is a prime.

It is a super-2 number, since 2×12320311131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12320311181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 684461721 + ... + 684461738.

It is an arithmetic number, because the mean of its divisors is an integer number (2966000830).

Almost surely, 2^12320311131 is an apocalyptic number.

12320311131 is a deficient number, since it is larger than the sum of its proper divisors (5475693849).

12320311131 is a wasteful number, since it uses less digits than its factorization.

12320311131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368923465 (or 1368923462 counting only the distinct ones).

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

Adding to 12320311131 its reverse (13111302321), we get a palindrome (25431613452).

The spelling of 12320311131 in words is "twelve billion, three hundred twenty million, three hundred eleven thousand, one hundred thirty-one".