31321223312 has 20 divisors (see below), whose sum is σ = 60691988976. Its totient is φ = 15658774560.

The previous prime is 31321223309. The next prime is 31321223377. The reversal of 31321223312 is 21332212313.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31487 + ... + 252257.

Almost surely, 2^31321223312 is an apocalyptic number.

It is an amenable number.

31321223312 is a deficient number, since it is larger than the sum of its proper divisors (29370765664).

31321223312 is a wasteful number, since it uses less digits than its factorization.

31321223312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229646 (or 229640 counting only the distinct ones).

The product of its digits is 1296, while the sum is 23.

Adding to 31321223312 its reverse (21332212313), we get a palindrome (52653435625).

The spelling of 31321223312 in words is "thirty-one billion, three hundred twenty-one million, two hundred twenty-three thousand, three hundred twelve".