31312213321203 has 64 divisors (see below), whose sum is σ = 47399533776000. Its totient is φ = 20425634611200.

The previous prime is 31312213321177. The next prime is 31312213321211. The reversal of 31312213321203 is 30212331221313.

31312213321203 is a `hidden beast` number, since 3 + 1 + 3 + 122 + 1 + 332 + 1 + 203 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-31312213321203 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (31312213321223) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 118542823 + ... + 118806671.

It is an arithmetic number, because the mean of its divisors is an integer number (740617715250).

Almost surely, 2^{31312213321203} is an apocalyptic number.

31312213321203 is a deficient number, since it is larger than the sum of its proper divisors (16087320454797).

31312213321203 is a wasteful number, since it uses less digits than its factorization.

31312213321203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264469 (or 264463 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 31312213321203 its reverse (30212331221313), we get a palindrome (61524544542516).

The spelling of 31312213321203 in words is "thirty-one trillion, three hundred twelve billion, two hundred thirteen million, three hundred twenty-one thousand, two hundred three".