12518797121 has 8 divisors (see below), whose sum is σ = 13750624320. Its totient is φ = 11344264272.

The previous prime is 12518797117. The next prime is 12518797157. The reversal of 12518797121 is 12179781521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12518797121 - 2² = 12518797117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12518797721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14323130 + ... + 14324003.

It is an arithmetic number, because the mean of its divisors is an integer number (1718828040).

Almost surely, 2^12518797121 is an apocalyptic number.

It is an amenable number.

12518797121 is a deficient number, since it is larger than the sum of its proper divisors (1231827199).

12518797121 is a wasteful number, since it uses less digits than its factorization.

12518797121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28647175.

The product of its digits is 70560, while the sum is 44.

The spelling of 12518797121 in words is "twelve billion, five hundred eighteen million, seven hundred ninety-seven thousand, one hundred twenty-one".