123120402340123 has 8 divisors (see below), whose sum is σ = 123664089209040. Its totient is φ = 122576726929920.

The previous prime is 123120402340093. The next prime is 123120402340129. The reversal of 123120402340123 is 321043204021321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123120402340123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123120402340091 and 123120402340100.

It is not an unprimeable number, because it can be changed into a prime (123120402340129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19041183 + ... + 24674023.

It is an arithmetic number, because the mean of its divisors is an integer number (15458011151130).

Almost surely, 2^{123120402340123} is an apocalyptic number.

123120402340123 is a deficient number, since it is larger than the sum of its proper divisors (543686868917).

123120402340123 is an equidigital number, since it uses as much as digits as its factorization.

123120402340123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5729357.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 123120402340123 its reverse (321043204021321), we get a palindrome (444163606361444).

The spelling of 123120402340123 in words is "one hundred twenty-three trillion, one hundred twenty billion, four hundred two million, three hundred forty thousand, one hundred twenty-three".