311213122012 has 24 divisors (see below), whose sum is σ = 621018041616. Its totient is φ = 135187600128.

The previous prime is 311213121959. The next prime is 311213122027. The reversal of 311213122012 is 210221312113.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176024638 + ... + 176026405.

It is an arithmetic number, because the mean of its divisors is an integer number (25875751734).

Almost surely, 2^311213122012 is an apocalyptic number.

It is an amenable number.

311213122012 is a deficient number, since it is larger than the sum of its proper divisors (309804919604).

311213122012 is a wasteful number, since it uses less digits than its factorization.

311213122012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352051077 (or 352051075 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 311213122012 its reverse (210221312113), we get a palindrome (521434434125).

The spelling of 311213122012 in words is "three hundred eleven billion, two hundred thirteen million, one hundred twenty-two thousand, twelve".