312123231103 has 4 divisors (see below), whose sum is σ = 312499737640. Its totient is φ = 311746724568.

The previous prime is 312123231067. The next prime is 312123231179. The reversal of 312123231103 is 301132321213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 301132321213 = 107 ⋅2814320759.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312123231103 is a prime.

It is a super-2 number, since 2×312123231103² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312123231193) 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, 188252025 + ... + 188253682.

It is an arithmetic number, because the mean of its divisors is an integer number (78124934410).

Almost surely, 2^312123231103 is an apocalyptic number.

312123231103 is a deficient number, since it is larger than the sum of its proper divisors (376506537).

312123231103 is an equidigital number, since it uses as much as digits as its factorization.

312123231103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376506536.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 312123231103 its reverse (301132321213), we get a palindrome (613255552316).

The spelling of 312123231103 in words is "three hundred twelve billion, one hundred twenty-three million, two hundred thirty-one thousand, one hundred three".