311030321212 has 96 divisors (see below), whose sum is σ = 626392166400. Its totient is φ = 134008680960.

The previous prime is 311030321209. The next prime is 311030321219. The reversal of 311030321212 is 212123030113.

It is a self number, because there is not a number n which added to its sum of digits gives 311030321212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311030321219) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123374512 + ... + 123377032.

It is an arithmetic number, because the mean of its divisors is an integer number (6524918400).

Almost surely, 2^311030321212 is an apocalyptic number.

It is an amenable number.

311030321212 is an abundant number, since it is smaller than the sum of its proper divisors (315361845188).

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

311030321212 is a wasteful number, since it uses less digits than its factorization.

311030321212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5003 (or 5001 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 311030321212 its reverse (212123030113), we get a palindrome (523153351325).

The spelling of 311030321212 in words is "three hundred eleven billion, thirty million, three hundred twenty-one thousand, two hundred twelve".