312122311 has 2 divisors, whose sum is σ = 312122312. Its totient is φ = 312122310.

The previous prime is 312122287. The next prime is 312122333. The reversal of 312122311 is 113221213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312122311 - 2²⁵ = 278567879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312122341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156061155 + 156061156.

It is an arithmetic number, because the mean of its divisors is an integer number (156061156).

Almost surely, 2^312122311 is an apocalyptic number.

312122311 is a deficient number, since it is larger than the sum of its proper divisors (1).

312122311 is an equidigital number, since it uses as much as digits as its factorization.

312122311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72, while the sum is 16.

The square root of 312122311 is about 17666.9836418105. The cubic root of 312122311 is about 678.3309057552.

Adding to 312122311 its reverse (113221213), we get a palindrome (425343524).

The spelling of 312122311 in words is "three hundred twelve million, one hundred twenty-two thousand, three hundred eleven".