31023221312 has 28 divisors (see below), whose sum is σ = 61739160240. Its totient is φ = 15466897536.

The previous prime is 31023221297. The next prime is 31023221321. The reversal of 31023221312 is 21312232013.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 676262 + ... + 720677.

Almost surely, 2^31023221312 is an apocalyptic number.

31023221312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31023221312 is a deficient number, since it is larger than the sum of its proper divisors (30715938928).

31023221312 is a wasteful number, since it uses less digits than its factorization.

31023221312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397298 (or 1397288 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31023221312 its reverse (21312232013), we get a palindrome (52335453325).

The spelling of 31023221312 in words is "thirty-one billion, twenty-three million, two hundred twenty-one thousand, three hundred twelve".