12420304123 has 16 divisors (see below), whose sum is σ = 13296490240. Its totient is φ = 11566605600.

The previous prime is 12420304097. The next prime is 12420304151. The reversal of 12420304123 is 32140302421.

It is a cyclic number.

It is not a de Polignac number, because 12420304123 - 2²⁵ = 12386749691 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12420304094 and 12420304103.

It is not an unprimeable number, because it can be changed into a prime (12420304723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3441586 + ... + 3445192.

It is an arithmetic number, because the mean of its divisors is an integer number (831030640).

Almost surely, 2^12420304123 is an apocalyptic number.

12420304123 is a deficient number, since it is larger than the sum of its proper divisors (876186117).

12420304123 is a wasteful number, since it uses less digits than its factorization.

12420304123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6658.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 12420304123 its reverse (32140302421), we get a palindrome (44560606544).

The spelling of 12420304123 in words is "twelve billion, four hundred twenty million, three hundred four thousand, one hundred twenty-three".