12188022 has 128 divisors (see below), whose sum is σ = 33619968. Its totient is φ = 2851200.

The previous prime is 12188021. The next prime is 12188027. The reversal of 12188022 is 22088121.

It is a junction number, because it is equal to n+sod(n) for n = 12187983 and 12188001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12188021) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 329388 + ... + 329424.

It is an arithmetic number, because the mean of its divisors is an integer number (262656).

Almost surely, 2^12188022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12188022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16809984).

12188022 is an abundant number, since it is smaller than the sum of its proper divisors (21431946).

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

12188022 is a wasteful number, since it uses less digits than its factorization.

12188022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114.

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 12188022 is about 3491.1347725346. The cubic root of 12188022 is about 230.1323875515.

Subtracting 12188022 from its reverse (22088121), we obtain a palindrome (9900099).

The spelling of 12188022 in words is "twelve million, one hundred eighty-eight thousand, twenty-two".