31132011212 has 24 divisors (see below), whose sum is σ = 56858457600. Its totient is φ = 14896238336.

The previous prime is 31132011173. The next prime is 31132011217. The reversal of 31132011212 is 21211023113.

It is not an unprimeable number, because it can be changed into a prime (31132011217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1174412 + ... + 1200627.

It is an arithmetic number, because the mean of its divisors is an integer number (2369102400).

Almost surely, 2^31132011212 is an apocalyptic number.

It is an amenable number.

31132011212 is a deficient number, since it is larger than the sum of its proper divisors (25726446388).

31132011212 is a wasteful number, since it uses less digits than its factorization.

31132011212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2375185 (or 2375183 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 31132011212 its reverse (21211023113), we get a palindrome (52343034325).

The spelling of 31132011212 in words is "thirty-one billion, one hundred thirty-two million, eleven thousand, two hundred twelve".