12189222 has 48 divisors (see below), whose sum is σ = 28782000. Its totient is φ = 3713472.

The previous prime is 12189181. The next prime is 12189257. The reversal of 12189222 is 22298121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9304 + ... + 10532.

It is an arithmetic number, because the mean of its divisors is an integer number (599625).

Almost surely, 2^12189222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12189222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14391000).

12189222 is an abundant number, since it is smaller than the sum of its proper divisors (16592778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12189222 is a wasteful number, since it uses less digits than its factorization.

12189222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1285 (or 1282 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 12189222 is about 3491.3066321937. The cubic root of 12189222 is about 230.1399400431.

It can be divided in two parts, 1218 and 9222, that added together give a triangular number (10440 = T₁₄₄).

The spelling of 12189222 in words is "twelve million, one hundred eighty-nine thousand, two hundred twenty-two".