311320120122 has 48 divisors (see below), whose sum is σ = 736452767232. Its totient is φ = 94261839360.

The previous prime is 311320120117. The next prime is 311320120129. The reversal of 311320120122 is 221021023113.

311320120122 is a `hidden beast` number, since 311 + 320 + 1 + 20 + 12 + 2 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 311320120095 and 311320120104.

It is not an unprimeable number, because it can be changed into a prime (311320120129) 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, 405018 + ... + 886949.

It is an arithmetic number, because the mean of its divisors is an integer number (15342765984).

Almost surely, 2^311320120122 is an apocalyptic number.

311320120122 is an abundant number, since it is smaller than the sum of its proper divisors (425132647110).

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

311320120122 is a wasteful number, since it uses less digits than its factorization.

311320120122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293203 (or 1293200 counting only the distinct ones).

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

Adding to 311320120122 its reverse (221021023113), we get a palindrome (532341143235).

The spelling of 311320120122 in words is "three hundred eleven billion, three hundred twenty million, one hundred twenty thousand, one hundred twenty-two".