311331230122 has 16 divisors (see below), whose sum is σ = 520290490752. Its totient is φ = 138503254720.

The previous prime is 311331230033. The next prime is 311331230129. The reversal of 311331230122 is 221032133113.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 311331230093 and 311331230102.

It is not an unprimeable number, because it can be changed into a prime (311331230129) 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, 150545983 + ... + 150548050.

It is an arithmetic number, because the mean of its divisors is an integer number (32518155672).

Almost surely, 2^311331230122 is an apocalyptic number.

311331230122 is a deficient number, since it is larger than the sum of its proper divisors (208959260630).

311331230122 is a wasteful number, since it uses less digits than its factorization.

311331230122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301094093.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 311331230122 its reverse (221032133113), we get a palindrome (532363363235).

The spelling of 311331230122 in words is "three hundred eleven billion, three hundred thirty-one million, two hundred thirty thousand, one hundred twenty-two".