312122012122 has 4 divisors (see below), whose sum is σ = 468183018186. Its totient is φ = 156061006060.

The previous prime is 312122012119. The next prime is 312122012129. The reversal of 312122012122 is 221210221213.

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., 202760183521 + 109361828601 = 450289^2 + 330699^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 312122012122.

It is not an unprimeable number, because it can be changed into a prime (312122012129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78030503029 + ... + 78030503032.

Almost surely, 2^312122012122 is an apocalyptic number.

312122012122 is a deficient number, since it is larger than the sum of its proper divisors (156061006064).

312122012122 is a wasteful number, since it uses less digits than its factorization.

312122012122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156061006063.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 312122012122 its reverse (221210221213), we get a palindrome (533332233335).

The spelling of 312122012122 in words is "three hundred twelve billion, one hundred twenty-two million, twelve thousand, one hundred twenty-two".