31112313203231 has 16 divisors (see below), whose sum is σ = 34285060175520. Its totient is φ = 28050933657600.

The previous prime is 31112313203219. The next prime is 31112313203239. The reversal of 31112313203231 is 13230231321113.

It is a cyclic number.

It is not a de Polignac number, because 31112313203231 - 2³⁴ = 31095133334047 is a prime.

It is a super-2 number, since 2×31112313203231² (a number of 28 digits) contains 22 as substring.

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 31112313203231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31112313203239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116479031 + ... + 116745831.

It is an arithmetic number, because the mean of its divisors is an integer number (2142816260970).

Almost surely, 2^{31112313203231} is an apocalyptic number.

31112313203231 is a deficient number, since it is larger than the sum of its proper divisors (3172746972289).

31112313203231 is a wasteful number, since it uses less digits than its factorization.

31112313203231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475466.

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

Adding to 31112313203231 its reverse (13230231321113), we get a palindrome (44342544524344).

The spelling of 31112313203231 in words is "thirty-one trillion, one hundred twelve billion, three hundred thirteen million, two hundred three thousand, two hundred thirty-one".