31311121303122 has 32 divisors (see below), whose sum is σ = 65883387757824. Its totient is φ = 9907276348800.

The previous prime is 31311121303103. The next prime is 31311121303129. The reversal of 31311121303122 is 22130312111313.

It is a junction number, because it is equal to n+sod(n) for n = 31311121303092 and 31311121303101.

It is not an unprimeable number, because it can be changed into a prime (31311121303129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1720004154 + ... + 1720022357.

It is an arithmetic number, because the mean of its divisors is an integer number (2058855867432).

Almost surely, 2^{31311121303122} is an apocalyptic number.

31311121303122 is an abundant number, since it is smaller than the sum of its proper divisors (34572266454702).

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

31311121303122 is a wasteful number, since it uses less digits than its factorization.

31311121303122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3440026594.

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 31311121303122 its reverse (22130312111313), we get a palindrome (53441433414435).

The spelling of 31311121303122 in words is "thirty-one trillion, three hundred eleven billion, one hundred twenty-one million, three hundred three thousand, one hundred twenty-two".