12271199 has 2 divisors, whose sum is σ = 12271200. Its totient is φ = 12271198.

The previous prime is 12271159. The next prime is 12271201. The reversal of 12271199 is 99117221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12271199 is a prime.

Together with 12271201, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12271159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6135599 + 6135600.

It is an arithmetic number, because the mean of its divisors is an integer number (6135600).

Almost surely, 2^12271199 is an apocalyptic number.

12271199 is a deficient number, since it is larger than the sum of its proper divisors (1).

12271199 is an equidigital number, since it uses as much as digits as its factorization.

12271199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268, while the sum is 32.

The square root of 12271199 is about 3503.0271195068. The cubic root of 12271199 is about 230.6547129898.

The spelling of 12271199 in words is "twelve million, two hundred seventy-one thousand, one hundred ninety-nine".