12221804 has 24 divisors (see below), whose sum is σ = 25014528. Its totient is φ = 5115600.

The previous prime is 12221801. The next prime is 12221819. The reversal of 12221804 is 40812221.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12221801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3872 + ... + 6279.

It is an arithmetic number, because the mean of its divisors is an integer number (1042272).

Almost surely, 2^12221804 is an apocalyptic number.

12221804 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12221804 is an abundant number, since it is smaller than the sum of its proper divisors (12792724).

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

12221804 is a wasteful number, since it uses less digits than its factorization.

12221804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10205 (or 10203 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 12221804 is about 3495.9696795024. The cubic root of 12221804 is about 230.3448136135.

The spelling of 12221804 in words is "twelve million, two hundred twenty-one thousand, eight hundred four".