31213103111300 has 72 divisors (see below), whose sum is σ = 78236394112800. Its totient is φ = 10682559347200.

The previous prime is 31213103111297. The next prime is 31213103111357. The reversal of 31213103111300 is 311130131213.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 834556250 + ... + 834593649.

It is an arithmetic number, because the mean of its divisors is an integer number (1086616584900).

Almost surely, 2^{31213103111300} is an apocalyptic number.

It is an amenable number.

31213103111300 is an abundant number, since it is smaller than the sum of its proper divisors (47023291001500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31213103111300 is a wasteful number, since it uses less digits than its factorization.

31213103111300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1669149941 (or 1669149934 counting only the distinct ones).

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

Adding to 31213103111300 its reverse (311130131213), we get a palindrome (31524233242513).

The spelling of 31213103111300 in words is "thirty-one trillion, two hundred thirteen billion, one hundred three million, one hundred eleven thousand, three hundred".