12919797999 has 42 divisors (see below), whose sum is σ = 19522116720. Its totient is φ = 8546434416.

The previous prime is 12919797997. The next prime is 12919798009. The reversal of 12919797999 is 99979791921.

It is not a de Polignac number, because 12919797999 - 2¹ = 12919797997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12919797991) by changing a digit.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 17968762 + ... + 17969480.

Almost surely, 2^12919797999 is an apocalyptic number.

12919797999 is a deficient number, since it is larger than the sum of its proper divisors (6602318721).

12919797999 is an frugal number, since it uses more digits than its factorization.

12919797999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1051 (or 879 counting only the distinct ones).

The product of its digits is 52081218, while the sum is 72.

The spelling of 12919797999 in words is "twelve billion, nine hundred nineteen million, seven hundred ninety-seven thousand, nine hundred ninety-nine".