311122023012 has 72 divisors (see below), whose sum is σ = 804864636576. Its totient is φ = 101279453184.

The previous prime is 311122023011. The next prime is 311122023029. The reversal of 311122023012 is 210320221113.

311122023012 is a `hidden beast` number, since 311 + 122 + 0 + 230 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (311122023011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13342948 + ... + 13366244.

It is an arithmetic number, because the mean of its divisors is an integer number (11178675508).

Almost surely, 2^311122023012 is an apocalyptic number.

It is an amenable number.

311122023012 is an abundant number, since it is smaller than the sum of its proper divisors (493742613564).

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

311122023012 is a wasteful number, since it uses less digits than its factorization.

311122023012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31977 (or 31972 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 311122023012 its reverse (210320221113), we get a palindrome (521442244125).

The spelling of 311122023012 in words is "three hundred eleven billion, one hundred twenty-two million, twenty-three thousand, twelve".