13221204 has 12 divisors (see below), whose sum is σ = 30849504. Its totient is φ = 4407064.

The previous prime is 13221199. The next prime is 13221209. The reversal of 13221204 is 40212231.

It is an interprime number because it is at equal distance from previous prime (13221199) and next prime (13221209).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550872 + ... + 550895.

It is an arithmetic number, because the mean of its divisors is an integer number (2570792).

Almost surely, 2^13221204 is an apocalyptic number.

It is an amenable number.

13221204 is an abundant number, since it is smaller than the sum of its proper divisors (17628300).

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

13221204 is a wasteful number, since it uses less digits than its factorization.

13221204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101774 (or 1101772 counting only the distinct ones).

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

The square root of 13221204 is about 3636.0973584325. The cubic root of 13221204 is about 236.4596280539.

Adding to 13221204 its reverse (40212231), we get a palindrome (53433435).

The spelling of 13221204 in words is "thirteen million, two hundred twenty-one thousand, two hundred four".