12172921199 has 2 divisors, whose sum is σ = 12172921200. Its totient is φ = 12172921198.

The previous prime is 12172921193. The next prime is 12172921237. The reversal of 12172921199 is 99112927121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12172921199 - 2²⁴ = 12156143983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12172921193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6086460599 + 6086460600.

It is an arithmetic number, because the mean of its divisors is an integer number (6086460600).

Almost surely, 2^12172921199 is an apocalyptic number.

12172921199 is a deficient number, since it is larger than the sum of its proper divisors (1).

12172921199 is an equidigital number, since it uses as much as digits as its factorization.

12172921199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 44.

The spelling of 12172921199 in words is "twelve billion, one hundred seventy-two million, nine hundred twenty-one thousand, one hundred ninety-nine".