312222222211 has 2 divisors, whose sum is σ = 312222222212. Its totient is φ = 312222222210.

The previous prime is 312222222199. The next prime is 312222222229. The reversal of 312222222211 is 112222222213.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312222222211 - 2¹⁵ = 312222189443 is a prime.

It is not a weakly prime, because it can be changed into another prime (312222222271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156111111105 + 156111111106.

It is an arithmetic number, because the mean of its divisors is an integer number (156111111106).

Almost surely, 2^312222222211 is an apocalyptic number.

312222222211 is a deficient number, since it is larger than the sum of its proper divisors (1).

312222222211 is an equidigital number, since it uses as much as digits as its factorization.

312222222211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768, while the sum is 22.

Adding to 312222222211 its reverse (112222222213), we get a palindrome (424444444424).

The spelling of 312222222211 in words is "three hundred twelve billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred eleven".