312123311 has 2 divisors, whose sum is σ = 312123312. Its totient is φ = 312123310.

The previous prime is 312123257. The next prime is 312123337. The reversal of 312123311 is 113321213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312123311 - 2¹⁰ = 312122287 is a prime.

It is a super-2 number, since 2×312123311² = 194841922539205442, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 312123311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312123211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156061655 + 156061656.

It is an arithmetic number, because the mean of its divisors is an integer number (156061656).

Almost surely, 2^312123311 is an apocalyptic number.

312123311 is a deficient number, since it is larger than the sum of its proper divisors (1).

312123311 is an equidigital number, since it uses as much as digits as its factorization.

312123311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108, while the sum is 17.

The square root of 312123311 is about 17667.0119431668. The cubic root of 312123311 is about 678.3316301830.

Adding to 312123311 its reverse (113321213), we get a palindrome (425444524).

The spelling of 312123311 in words is "three hundred twelve million, one hundred twenty-three thousand, three hundred eleven".