312122131111013 has 4 divisors (see below), whose sum is σ = 312123321221388. Its totient is φ = 312120941000640.

The previous prime is 312122131110931. The next prime is 312122131111031. The reversal of 312122131111013 is 310111131221213.

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

It can be written as a sum of positive squares in 2 ways, for example, as 127587348838849 + 184534782272164 = 11295457^2 + 13584358^2 .

It is a cyclic number.

It is not a de Polignac number, because 312122131111013 - 2¹² = 312122131106917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 312122131111013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312122131119013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 594661706 + ... + 595186347.

It is an arithmetic number, because the mean of its divisors is an integer number (78030830305347).

Almost surely, 2^{312122131111013} is an apocalyptic number.

It is an amenable number.

312122131111013 is a deficient number, since it is larger than the sum of its proper divisors (1190110375).

312122131111013 is a wasteful number, since it uses less digits than its factorization.

312122131111013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190110374.

The product of its (nonzero) digits is 216, while the sum is 23.

Adding to 312122131111013 its reverse (310111131221213), we get a palindrome (622233262332226).

The spelling of 312122131111013 in words is "three hundred twelve trillion, one hundred twenty-two billion, one hundred thirty-one million, one hundred eleven thousand, thirteen".