311212112087 has 2 divisors, whose sum is σ = 311212112088. Its totient is φ = 311212112086.

The previous prime is 311212111943. The next prime is 311212112153. The reversal of 311212112087 is 780211212113.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 311212112087 - 2¹⁴ = 311212095703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311212111087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155606056043 + 155606056044.

It is an arithmetic number, because the mean of its divisors is an integer number (155606056044).

Almost surely, 2^311212112087 is an apocalyptic number.

311212112087 is a deficient number, since it is larger than the sum of its proper divisors (1).

311212112087 is an equidigital number, since it uses as much as digits as its factorization.

311212112087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 29.

The spelling of 311212112087 in words is "three hundred eleven billion, two hundred twelve million, one hundred twelve thousand, eighty-seven".