12213166 has 8 divisors (see below), whose sum is σ = 20936880. Its totient is φ = 5234208.

The previous prime is 12213137. The next prime is 12213167. The reversal of 12213166 is 66131221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12213166² = 298322847487112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12213167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 436171 + ... + 436198.

It is an arithmetic number, because the mean of its divisors is an integer number (2617110).

Almost surely, 2^12213166 is an apocalyptic number.

12213166 is a deficient number, since it is larger than the sum of its proper divisors (8723714).

12213166 is an equidigital number, since it uses as much as digits as its factorization.

12213166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872378.

The product of its digits is 432, while the sum is 22.

The square root of 12213166 is about 3494.7340385214. The cubic root of 12213166 is about 230.2905339169.

Adding to 12213166 its reverse (66131221), we get a palindrome (78344387).

The spelling of 12213166 in words is "twelve million, two hundred thirteen thousand, one hundred sixty-six".