123221310311123 has 4 divisors (see below), whose sum is σ = 123236547281040. Its totient is φ = 123206073341208.

The previous prime is 123221310311117. The next prime is 123221310311207. The reversal of 123221310311123 is 321113013122321.

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 123221310311123 - 2¹² = 123221310307027 is a prime.

It is a super-2 number, since 2×123221310311123² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123221310311092 and 123221310311101.

It is not an unprimeable number, because it can be changed into a prime (123221310371123) 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, 7618472828 + ... + 7618489001.

It is an arithmetic number, because the mean of its divisors is an integer number (30809136820260).

Almost surely, 2^{123221310311123} is an apocalyptic number.

123221310311123 is a deficient number, since it is larger than the sum of its proper divisors (15236969917).

123221310311123 is an equidigital number, since it uses as much as digits as its factorization.

123221310311123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15236969916.

The product of its (nonzero) digits is 1296, while the sum is 26.

Adding to 123221310311123 its reverse (321113013122321), we get a palindrome (444334323433444).

The spelling of 123221310311123 in words is "one hundred twenty-three trillion, two hundred twenty-one billion, three hundred ten million, three hundred eleven thousand, one hundred twenty-three".