31312031111 has 8 divisors (see below), whose sum is σ = 34595390304. Its totient is φ = 28188835840.

The previous prime is 31312031021. The next prime is 31312031123. The reversal of 31312031111 is 11113021313.

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 31312031111 - 2¹⁸ = 31311768967 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31312031111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312031131) 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, 40040570 + ... + 40041351.

It is an arithmetic number, because the mean of its divisors is an integer number (4324423788).

Almost surely, 2^31312031111 is an apocalyptic number.

31312031111 is a deficient number, since it is larger than the sum of its proper divisors (3283359193).

31312031111 is a wasteful number, since it uses less digits than its factorization.

31312031111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80081961.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 31312031111 its reverse (11113021313), we get a palindrome (42425052424).

The spelling of 31312031111 in words is "thirty-one billion, three hundred twelve million, thirty-one thousand, one hundred eleven".