311311331212 has 48 divisors (see below), whose sum is σ = 626085008640. Its totient is φ = 132678568512.

The previous prime is 311311331183. The next prime is 311311331213. The reversal of 311311331212 is 212133113113.

It is not an unprimeable number, because it can be changed into a prime (311311331213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5584614 + ... + 5640082.

It is an arithmetic number, because the mean of its divisors is an integer number (13043437680).

Almost surely, 2^311311331212 is an apocalyptic number.

It is an amenable number.

311311331212 is an abundant number, since it is smaller than the sum of its proper divisors (314773677428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

311311331212 is a wasteful number, since it uses less digits than its factorization.

311311331212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56590 (or 56588 counting only the distinct ones).

The product of its digits is 324, while the sum is 22.

Adding to 311311331212 its reverse (212133113113), we get a palindrome (523444444325).

The spelling of 311311331212 in words is "three hundred eleven billion, three hundred eleven million, three hundred thirty-one thousand, two hundred twelve".