311330313212 has 24 divisors (see below), whose sum is σ = 576894472560. Its totient is φ = 146503883520.

The previous prime is 311330313191. The next prime is 311330313227. The reversal of 311330313212 is 212313033113.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3438887 + ... + 3528257.

It is an arithmetic number, because the mean of its divisors is an integer number (24037269690).

Almost surely, 2^311330313212 is an apocalyptic number.

It is an amenable number.

311330313212 is a deficient number, since it is larger than the sum of its proper divisors (265564159348).

311330313212 is a wasteful number, since it uses less digits than its factorization.

311330313212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140621 (or 140619 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 311330313212 its reverse (212313033113), we get a palindrome (523643346325).

The spelling of 311330313212 in words is "three hundred eleven billion, three hundred thirty million, three hundred thirteen thousand, two hundred twelve".