311131311212 has 48 divisors (see below), whose sum is σ = 584190351360. Its totient is φ = 144466113792.

The previous prime is 311131311203. The next prime is 311131311311. The reversal of 311131311212 is 212113131113.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8485583 + ... + 8522169.

It is an arithmetic number, because the mean of its divisors is an integer number (12170632320).

Almost surely, 2^311131311212 is an apocalyptic number.

It is an amenable number.

311131311212 is a deficient number, since it is larger than the sum of its proper divisors (273059040148).

311131311212 is a wasteful number, since it uses less digits than its factorization.

311131311212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38270 (or 38268 counting only the distinct ones).

The product of its digits is 108, while the sum is 20.

Adding to 311131311212 its reverse (212113131113), we get a palindrome (523244442325).

The spelling of 311131311212 in words is "three hundred eleven billion, one hundred thirty-one million, three hundred eleven thousand, two hundred twelve".