31312111203 has 36 divisors (see below), whose sum is σ = 46558289232. Its totient is φ = 20276443200.

The previous prime is 31312111163. The next prime is 31312111223. The reversal of 31312111203 is 30211121313.

It is not a de Polignac number, because 31312111203 - 2¹² = 31312107107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31312111223) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2547250 + ... + 2559512.

It is an arithmetic number, because the mean of its divisors is an integer number (1293285812).

Almost surely, 2^31312111203 is an apocalyptic number.

31312111203 is a deficient number, since it is larger than the sum of its proper divisors (15246178029).

31312111203 is a wasteful number, since it uses less digits than its factorization.

31312111203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12476 (or 12420 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 31312111203 its reverse (30211121313), we get a palindrome (61523232516).

The spelling of 31312111203 in words is "thirty-one billion, three hundred twelve million, one hundred eleven thousand, two hundred three".