231133012131 has 64 divisors (see below), whose sum is σ = 369261674496. Its totient is φ = 125735068800.

The previous prime is 231133012063. The next prime is 231133012157. The reversal of 231133012131 is 131210331132.

It is a happy number.

It is not a de Polignac number, because 231133012131 - 2²³ = 231124623523 is a prime.

It is a super-2 number, since 2×231133012131² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 231133012098 and 231133012107.

It is not an unprimeable number, because it can be changed into a prime (231133062131) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 109488766 + ... + 109490876.

It is an arithmetic number, because the mean of its divisors is an integer number (5769713664).

Almost surely, 2^231133012131 is an apocalyptic number.

231133012131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

231133012131 is a deficient number, since it is larger than the sum of its proper divisors (138128662365).

231133012131 is a wasteful number, since it uses less digits than its factorization.

231133012131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3112.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 231133012131 its reverse (131210331132), we get a palindrome (362343343263).

The spelling of 231133012131 in words is "two hundred thirty-one billion, one hundred thirty-three million, twelve thousand, one hundred thirty-one".