12166199 has 4 divisors (see below), whose sum is σ = 12183840. Its totient is φ = 12148560.

The previous prime is 12166181. The next prime is 12166201. The reversal of 12166199 is 99166121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99166121 = 2423 ⋅40927.

It is a cyclic number.

It is not a de Polignac number, because 12166199 - 2⁸ = 12165943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12166139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7742 + ... + 9179.

It is an arithmetic number, because the mean of its divisors is an integer number (3045960).

Almost surely, 2^12166199 is an apocalyptic number.

12166199 is a deficient number, since it is larger than the sum of its proper divisors (17641).

12166199 is an equidigital number, since it uses as much as digits as its factorization.

12166199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17640.

The product of its digits is 5832, while the sum is 35.

The square root of 12166199 is about 3488.0078841654. The cubic root of 12166199 is about 229.9949526303.

The spelling of 12166199 in words is "twelve million, one hundred sixty-six thousand, one hundred ninety-nine".