312111213247 has 2 divisors, whose sum is σ = 312111213248. Its totient is φ = 312111213246.

The previous prime is 312111213209. The next prime is 312111213269. The reversal of 312111213247 is 742312111213.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312111213247 - 2¹¹ = 312111211199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312111213847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156055606623 + 156055606624.

It is an arithmetic number, because the mean of its divisors is an integer number (156055606624).

Almost surely, 2^312111213247 is an apocalyptic number.

312111213247 is a deficient number, since it is larger than the sum of its proper divisors (1).

312111213247 is an equidigital number, since it uses as much as digits as its factorization.

312111213247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 28.

The spelling of 312111213247 in words is "three hundred twelve billion, one hundred eleven million, two hundred thirteen thousand, two hundred forty-seven".