312111121111213 has 4 divisors (see below), whose sum is σ = 315201330231228. Its totient is φ = 309020911991200.

The previous prime is 312111121111187. The next prime is 312111121111243.

312111121111213 is nontrivially palindromic in base 10.

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 264434333304969 + 47676787806244 = 16261437^2 + 6904838^2 .

It is a cyclic number.

It is not a de Polignac number, because 312111121111213 - 2²¹ = 312111119014061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312111121111243) 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, 1545104559856 + ... + 1545104560057.

It is an arithmetic number, because the mean of its divisors is an integer number (78800332557807).

Almost surely, 2^{312111121111213} is an apocalyptic number.

It is an amenable number.

312111121111213 is a deficient number, since it is larger than the sum of its proper divisors (3090209120015).

312111121111213 is a wasteful number, since it uses less digits than its factorization.

312111121111213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3090209120014.

The product of its digits is 72, while the sum is 22.

The spelling of 312111121111213 in words is "three hundred twelve trillion, one hundred eleven billion, one hundred twenty-one million, one hundred eleven thousand, two hundred thirteen".