312122202121 has 4 divisors (see below), whose sum is σ = 325692732672. Its totient is φ = 298551671572.

The previous prime is 312122202083. The next prime is 312122202131. The reversal of 312122202121 is 121202221213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 312122202121 - 2¹¹ = 312122200073 is a prime.

It is a super-3 number, since 3×312122202121³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312122202131) 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 3 ways as a sum of consecutive naturals, for example, 6785265241 + ... + 6785265286.

It is an arithmetic number, because the mean of its divisors is an integer number (81423183168).

Almost surely, 2^312122202121 is an apocalyptic number.

It is an amenable number.

312122202121 is a deficient number, since it is larger than the sum of its proper divisors (13570530551).

312122202121 is a wasteful number, since it uses less digits than its factorization.

312122202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13570530550.

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

Adding to 312122202121 its reverse (121202221213), we get a palindrome (433324423334).

The spelling of 312122202121 in words is "three hundred twelve billion, one hundred twenty-two million, two hundred two thousand, one hundred twenty-one".