31320323012 has 12 divisors (see below), whose sum is σ = 59793344016. Its totient is φ = 14236510440.

The previous prime is 31320323011. The next prime is 31320323107. The reversal of 31320323012 is 21032302313.

It is not an unprimeable number, because it can be changed into a prime (31320323011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355912718 + ... + 355912805.

It is an arithmetic number, because the mean of its divisors is an integer number (4982778668).

Almost surely, 2^31320323012 is an apocalyptic number.

It is an amenable number.

31320323012 is a deficient number, since it is larger than the sum of its proper divisors (28473021004).

31320323012 is a wasteful number, since it uses less digits than its factorization.

31320323012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711825538 (or 711825536 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 31320323012 its reverse (21032302313), we get a palindrome (52352625325).

The spelling of 31320323012 in words is "thirty-one billion, three hundred twenty million, three hundred twenty-three thousand, twelve".