31312203012012 has 96 divisors (see below), whose sum is σ = 79272834764032. Its totient is φ = 9562309376256.

The previous prime is 31312203012007. The next prime is 31312203012113. The reversal of 31312203012012 is 21021030221313.

31312203012012 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 31312203012012.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20902503 + ... + 22350369.

Almost surely, 2^{31312203012012} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31312203012012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39636417382016).

31312203012012 is an abundant number, since it is smaller than the sum of its proper divisors (47960631752020).

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

31312203012012 is a wasteful number, since it uses less digits than its factorization.

31312203012012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1448927 (or 1448925 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 31312203012012 its reverse (21021030221313), we get a palindrome (52333233233325).

The spelling of 31312203012012 in words is "thirty-one trillion, three hundred twelve billion, two hundred three million, twelve thousand, twelve".