31332320012 has 24 divisors (see below), whose sum is σ = 64825491360. Its totient is φ = 12965097600.

The previous prime is 31332319981. The next prime is 31332320027. The reversal of 31332320012 is 21002323313.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19292489 + ... + 19294112.

It is an arithmetic number, because the mean of its divisors is an integer number (2701062140).

Almost surely, 2^31332320012 is an apocalyptic number.

It is an amenable number.

31332320012 is an abundant number, since it is smaller than the sum of its proper divisors (33493171348).

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

31332320012 is a wasteful number, since it uses less digits than its factorization.

31332320012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38586641 (or 38586639 counting only the distinct ones).

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

Adding to 31332320012 its reverse (21002323313), we get a palindrome (52334643325).

The spelling of 31332320012 in words is "thirty-one billion, three hundred thirty-two million, three hundred twenty thousand, twelve".