12312111322213 has 4 divisors (see below), whose sum is σ = 12329476783180. Its totient is φ = 12294745861248.

The previous prime is 12312111322163. The next prime is 12312111322297. The reversal of 12312111322213 is 31222311121321.

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 2348884216449 + 9963227105764 = 1532607^2 + 3156458^2 .

It is a cyclic number.

It is not a de Polignac number, because 12312111322213 - 2²⁹ = 12311574451301 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 (12312111329213) 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, 8682729420 + ... + 8682730837.

It is an arithmetic number, because the mean of its divisors is an integer number (3082369195795).

Almost surely, 2^{12312111322213} is an apocalyptic number.

It is an amenable number.

12312111322213 is a deficient number, since it is larger than the sum of its proper divisors (17365460967).

12312111322213 is an equidigital number, since it uses as much as digits as its factorization.

12312111322213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17365460966.

The product of its digits is 864, while the sum is 25.

Adding to 12312111322213 its reverse (31222311121321), we get a palindrome (43534422443534).

The spelling of 12312111322213 in words is "twelve trillion, three hundred twelve billion, one hundred eleven million, three hundred twenty-two thousand, two hundred thirteen".