12112321131 has 12 divisors (see below), whose sum is σ = 17505312760. Its totient is φ = 8070386400.

The previous prime is 12112321127. The next prime is 12112321181. The reversal of 12112321131 is 13112321121.

12112321131 is a `hidden beast` number, since 1 + 211 + 2 + 321 + 131 = 666.

It is not a de Polignac number, because 12112321131 - 2² = 12112321127 is a prime.

It is a super-2 number, since 2×12112321131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12112321181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 357421 + ... + 389838.

Almost surely, 2^12112321131 is an apocalyptic number.

12112321131 is a deficient number, since it is larger than the sum of its proper divisors (5392991629).

12112321131 is a wasteful number, since it uses less digits than its factorization.

12112321131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749066 (or 749063 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 12112321131 its reverse (13112321121), we get a palindrome (25224642252).

The spelling of 12112321131 in words is "twelve billion, one hundred twelve million, three hundred twenty-one thousand, one hundred thirty-one".