311323212012 has 24 divisors (see below), whose sum is σ = 736652109312. Its totient is φ = 102312792400.

The previous prime is 311323211999. The next prime is 311323212019. The reversal of 311323212012 is 210212323113.

It is a self number, because there is not a number n which added to its sum of digits gives 311323212012.

It is not an unprimeable number, because it can be changed into a prime (311323212019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182700564 + ... + 182702267.

It is an arithmetic number, because the mean of its divisors is an integer number (30693837888).

Almost surely, 2^311323212012 is an apocalyptic number.

It is an amenable number.

311323212012 is an abundant number, since it is smaller than the sum of its proper divisors (425328897300).

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

311323212012 is a wasteful number, since it uses less digits than its factorization.

311323212012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365402909 (or 365402907 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 311323212012 its reverse (210212323113), we get a palindrome (521535535125).

It can be divided in two parts, 311 and 323212012, that added together give a palindrome (323212323).

The spelling of 311323212012 in words is "three hundred eleven billion, three hundred twenty-three million, two hundred twelve thousand, twelve".