31233320012 has 36 divisors (see below), whose sum is σ = 59547410496. Its totient is φ = 14317460640.

The previous prime is 31233319991. The next prime is 31233320017. The reversal of 31233320012 is 21002333213.

It is not an unprimeable number, because it can be changed into a prime (31233320017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 304103 + ... + 393630.

It is an arithmetic number, because the mean of its divisors is an integer number (1654094736).

Almost surely, 2^31233320012 is an apocalyptic number.

It is an amenable number.

31233320012 is a deficient number, since it is larger than the sum of its proper divisors (28314090484).

31233320012 is a wasteful number, since it uses less digits than its factorization.

31233320012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697806 (or 697785 counting only the distinct ones).

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

Adding to 31233320012 its reverse (21002333213), we get a palindrome (52235653225).

The spelling of 31233320012 in words is "thirty-one billion, two hundred thirty-three million, three hundred twenty thousand, twelve".