12660126123 has 4 divisors (see below), whose sum is σ = 16880168168. Its totient is φ = 8440084080.

The previous prime is 12660126109. The next prime is 12660126173. The reversal of 12660126123 is 32162106621.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12660126123 - 2²⁶ = 12593017259 is a prime.

It is a super-2 number, since 2×12660126123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12660126173) 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, 2110021018 + ... + 2110021023.

It is an arithmetic number, because the mean of its divisors is an integer number (4220042042).

Almost surely, 2^12660126123 is an apocalyptic number.

12660126123 is a deficient number, since it is larger than the sum of its proper divisors (4220042045).

12660126123 is an equidigital number, since it uses as much as digits as its factorization.

12660126123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4220042044.

The product of its (nonzero) digits is 5184, while the sum is 30.

The spelling of 12660126123 in words is "twelve billion, six hundred sixty million, one hundred twenty-six thousand, one hundred twenty-three".