31233120231131 has 32 divisors (see below), whose sum is σ = 38526759129600. Its totient is φ = 24656685949440.

The previous prime is 31233120231127. The next prime is 31233120231151. The reversal of 31233120231131 is 13113202133213.

It is a cyclic number.

It is not a de Polignac number, because 31233120231131 - 2² = 31233120231127 is a prime.

It is a super-2 number, since 2×31233120231131² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31233120231131.

It is not an unprimeable number, because it can be changed into a prime (31233120231101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91025411 + ... + 91367891.

It is an arithmetic number, because the mean of its divisors is an integer number (1203961222800).

Almost surely, 2^{31233120231131} is an apocalyptic number.

31233120231131 is a deficient number, since it is larger than the sum of its proper divisors (7293638898469).

31233120231131 is a wasteful number, since it uses less digits than its factorization.

31233120231131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344739.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 31233120231131 its reverse (13113202133213), we get a palindrome (44346322364344).

The spelling of 31233120231131 in words is "thirty-one trillion, two hundred thirty-three billion, one hundred twenty million, two hundred thirty-one thousand, one hundred thirty-one".