13221201 has 16 divisors (see below), whose sum is σ = 20478848. Its totient is φ = 7430400.

The previous prime is 13221199. The next prime is 13221209. The reversal of 13221201 is 10212231.

It is not a de Polignac number, because 13221201 - 2¹ = 13221199 is a prime.

It is a Duffinian 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 15 ways as a sum of consecutive naturals, for example, 3880 + ... + 6441.

It is an arithmetic number, because the mean of its divisors is an integer number (1279928).

Almost surely, 2^13221201 is an apocalyptic number.

It is an amenable number.

13221201 is a deficient number, since it is larger than the sum of its proper divisors (7257647).

13221201 is a wasteful number, since it uses less digits than its factorization.

13221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10392.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 13221201 is about 3636.0969459023. The cubic root of 13221201 is about 236.4596101690.

Adding to 13221201 its reverse (10212231), we get a palindrome (23433432).

The spelling of 13221201 in words is "thirteen million, two hundred twenty-one thousand, two hundred one".