312123221113123 has 4 divisors (see below), whose sum is σ = 356712252700720. Its totient is φ = 267534189525528.

The previous prime is 312123221113079. The next prime is 312123221113127. The reversal of 312123221113123 is 321311122321213.

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 312123221113123 - 2⁹ = 312123221112611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 312123221113091 and 312123221113100.

It is not an unprimeable number, because it can be changed into a prime (312123221113127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22294515793788 + ... + 22294515793801.

It is an arithmetic number, because the mean of its divisors is an integer number (89178063175180).

Almost surely, 2^{312123221113123} is an apocalyptic number.

312123221113123 is a deficient number, since it is larger than the sum of its proper divisors (44589031587597).

312123221113123 is an equidigital number, since it uses as much as digits as its factorization.

312123221113123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44589031587596.

The product of its digits is 2592, while the sum is 28.

Adding to 312123221113123 its reverse (321311122321213), we get a palindrome (633434343434336).

The spelling of 312123221113123 in words is "three hundred twelve trillion, one hundred twenty-three billion, two hundred twenty-one million, one hundred thirteen thousand, one hundred twenty-three".