312111321439 has 2 divisors, whose sum is σ = 312111321440. Its totient is φ = 312111321438.

The previous prime is 312111321409. The next prime is 312111321443. The reversal of 312111321439 is 934123111213.

It is a strong prime.

It is an emirp because it is prime and its reverse (934123111213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312111321439 - 2²⁵ = 312077767007 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 312111321439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312111321409) 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 as a sum of consecutive naturals, namely, 156055660719 + 156055660720.

It is an arithmetic number, because the mean of its divisors is an integer number (156055660720).

Almost surely, 2^312111321439 is an apocalyptic number.

312111321439 is a deficient number, since it is larger than the sum of its proper divisors (1).

312111321439 is an equidigital number, since it uses as much as digits as its factorization.

312111321439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 31.

The spelling of 312111321439 in words is "three hundred twelve billion, one hundred eleven million, three hundred twenty-one thousand, four hundred thirty-nine".