312021120122 has 4 divisors (see below), whose sum is σ = 468031680186. Its totient is φ = 156010560060.

The previous prime is 312021120109. The next prime is 312021120149. The reversal of 312021120122 is 221021120213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 310013990521 + 2007129601 = 556789^2 + 44801^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 312021120122.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 78005280029 + ... + 78005280032.

Almost surely, 2^312021120122 is an apocalyptic number.

312021120122 is a deficient number, since it is larger than the sum of its proper divisors (156010560064).

312021120122 is a wasteful number, since it uses less digits than its factorization.

312021120122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156010560063.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 312021120122 its reverse (221021120213), we get a palindrome (533042240335).

Subtracting from 312021120122 its reverse (221021120213), we obtain a palindrome (90999999909).

The spelling of 312021120122 in words is "three hundred twelve billion, twenty-one million, one hundred twenty thousand, one hundred twenty-two".