312102123 has 4 divisors (see below), whose sum is σ = 416136168. Its totient is φ = 208068080.

The previous prime is 312102023. The next prime is 312102143. The reversal of 312102123 is 321201213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 312102123 - 2²⁴ = 295324907 is a prime.

It is a super-2 number, since 2×312102123² = 194815470362214258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (312102143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52017018 + ... + 52017023.

It is an arithmetic number, because the mean of its divisors is an integer number (104034042).

Almost surely, 2^312102123 is an apocalyptic number.

312102123 is a deficient number, since it is larger than the sum of its proper divisors (104034045).

312102123 is a wasteful number, since it uses less digits than its factorization.

312102123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104034044.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 312102123 is about 17666.4122843321. The cubic root of 312102123 is about 678.3162806771.

Adding to 312102123 its reverse (321201213), we get a palindrome (633303336).

It can be divided in two parts, 31210 and 2123, that added together give a palindrome (33333).

The spelling of 312102123 in words is "three hundred twelve million, one hundred two thousand, one hundred twenty-three".