31320140012 has 24 divisors (see below), whose sum is σ = 64800291360. Its totient is φ = 12960057600.

The previous prime is 31320139969. The next prime is 31320140017. The reversal of 31320140012 is 21004102313.

It is not an unprimeable number, because it can be changed into a prime (31320140017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19284989 + ... + 19286612.

It is an arithmetic number, because the mean of its divisors is an integer number (2700012140).

Almost surely, 2^31320140012 is an apocalyptic number.

It is an amenable number.

31320140012 is an abundant number, since it is smaller than the sum of its proper divisors (33480151348).

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

31320140012 is a wasteful number, since it uses less digits than its factorization.

31320140012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38571641 (or 38571639 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31320140012 its reverse (21004102313), we get a palindrome (52324242325).

The spelling of 31320140012 in words is "thirty-one billion, three hundred twenty million, one hundred forty thousand, twelve".