31112133131 has 8 divisors (see below), whose sum is σ = 31959081024. Its totient is φ = 30265505280.

The previous prime is 31112133127. The next prime is 31112133161. The reversal of 31112133131 is 13133121113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31112133131 - 2² = 31112133127 is a prime.

It is a super-2 number, since 2×31112133131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31112133161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124046 + ... + 278588.

It is an arithmetic number, because the mean of its divisors is an integer number (3994885128).

Almost surely, 2^31112133131 is an apocalyptic number.

31112133131 is a deficient number, since it is larger than the sum of its proper divisors (846947893).

31112133131 is a wasteful number, since it uses less digits than its factorization.

31112133131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160021.

The product of its digits is 162, while the sum is 20.

Adding to 31112133131 its reverse (13133121113), we get a palindrome (44245254244).

The spelling of 31112133131 in words is "thirty-one billion, one hundred twelve million, one hundred thirty-three thousand, one hundred thirty-one".