123104130123 has 64 divisors (see below), whose sum is σ = 189292723200. Its totient is φ = 70491512832.

The previous prime is 123104130103. The next prime is 123104130133. The reversal of 123104130123 is 321031401321.

It is not a de Polignac number, because 123104130123 - 2⁶ = 123104130059 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123104130123.

It is not an unprimeable number, because it can be changed into a prime (123104130103) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 42492211 + ... + 42495107.

It is an arithmetic number, because the mean of its divisors is an integer number (2957698800).

Almost surely, 2^123104130123 is an apocalyptic number.

123104130123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

123104130123 is a deficient number, since it is larger than the sum of its proper divisors (66188593077).

123104130123 is a wasteful number, since it uses less digits than its factorization.

123104130123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3636.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 123104130123 its reverse (321031401321), we get a palindrome (444135531444).

The spelling of 123104130123 in words is "one hundred twenty-three billion, one hundred four million, one hundred thirty thousand, one hundred twenty-three".