12605712123 has 4 divisors (see below), whose sum is σ = 16807616168. Its totient is φ = 8403808080.

The previous prime is 12605712121. The next prime is 12605712137. The reversal of 12605712123 is 32121750621.

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

It is not a de Polignac number, because 12605712123 - 2¹ = 12605712121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12605712121) 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, 2100952018 + ... + 2100952023.

It is an arithmetic number, because the mean of its divisors is an integer number (4201904042).

Almost surely, 2^12605712123 is an apocalyptic number.

12605712123 is a deficient number, since it is larger than the sum of its proper divisors (4201904045).

12605712123 is an equidigital number, since it uses as much as digits as its factorization.

12605712123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4201904044.

The product of its (nonzero) digits is 5040, while the sum is 30.

The spelling of 12605712123 in words is "twelve billion, six hundred five million, seven hundred twelve thousand, one hundred twenty-three".