12221304 has 16 divisors (see below), whose sum is σ = 30553320. Its totient is φ = 4073760.

The previous prime is 12221273. The next prime is 12221327. The reversal of 12221304 is 40312221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254587 + ... + 254634.

Almost surely, 2^12221304 is an apocalyptic number.

It is an amenable number.

12221304 is an abundant number, since it is smaller than the sum of its proper divisors (18332016).

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

12221304 is a wasteful number, since it uses less digits than its factorization.

12221304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509230 (or 509226 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 12221304 is about 3495.8981678533. The cubic root of 12221304 is about 230.3416723976.

Adding to 12221304 its reverse (40312221), we get a palindrome (52533525).

The spelling of 12221304 in words is "twelve million, two hundred twenty-one thousand, three hundred four".