12779120899 has 2 divisors, whose sum is σ = 12779120900. Its totient is φ = 12779120898.

The previous prime is 12779120857. The next prime is 12779120903. The reversal of 12779120899 is 99802197721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12779120899 - 2¹⁵ = 12779088131 is a prime.

It is not a weakly prime, because it can be changed into another prime (12779120839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6389560449 + 6389560450.

It is an arithmetic number, because the mean of its divisors is an integer number (6389560450).

Almost surely, 2^12779120899 is an apocalyptic number.

12779120899 is a deficient number, since it is larger than the sum of its proper divisors (1).

12779120899 is an equidigital number, since it uses as much as digits as its factorization.

12779120899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1143072, while the sum is 55.

The spelling of 12779120899 in words is "twelve billion, seven hundred seventy-nine million, one hundred twenty thousand, eight hundred ninety-nine".