12599859121 has 4 divisors (see below), whose sum is σ = 12940395892. Its totient is φ = 12259322352.

The previous prime is 12599859113. The next prime is 12599859127. The reversal of 12599859121 is 12195899521.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9622629025 + 2977230096 = 98095^2 + 54564^2 .

It is a cyclic number.

It is not a de Polignac number, because 12599859121 - 2³ = 12599859113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12599859127) 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, 170268330 + ... + 170268403.

It is an arithmetic number, because the mean of its divisors is an integer number (3235098973).

Almost surely, 2^12599859121 is an apocalyptic number.

It is an amenable number.

12599859121 is a deficient number, since it is larger than the sum of its proper divisors (340536771).

12599859121 is an equidigital number, since it uses as much as digits as its factorization.

12599859121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340536770.

The product of its digits is 583200, while the sum is 52.

The spelling of 12599859121 in words is "twelve billion, five hundred ninety-nine million, eight hundred fifty-nine thousand, one hundred twenty-one".