312111103 has 2 divisors, whose sum is σ = 312111104. Its totient is φ = 312111102.

The previous prime is 312111083. The next prime is 312111139. The reversal of 312111103 is 301111213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312111103 - 2²⁵ = 278556671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312111703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156055551 + 156055552.

It is an arithmetic number, because the mean of its divisors is an integer number (156055552).

Almost surely, 2^312111103 is an apocalyptic number.

312111103 is a deficient number, since it is larger than the sum of its proper divisors (1).

312111103 is an equidigital number, since it uses as much as digits as its factorization.

312111103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 312111103 is about 17666.6664371069. Note that the first 3 decimals coincide. The cubic root of 312111103 is about 678.3227862633.

Adding to 312111103 its reverse (301111213), we get a palindrome (613222316).

The spelling of 312111103 in words is "three hundred twelve million, one hundred eleven thousand, one hundred three".