11204221 has 4 divisors (see below), whose sum is σ = 12804832. Its totient is φ = 9603612.

The previous prime is 11204213. The next prime is 11204231. The reversal of 11204221 is 12240211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11204221 - 2³ = 11204213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11204231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 800295 + ... + 800308.

It is an arithmetic number, because the mean of its divisors is an integer number (3201208).

Almost surely, 2^11204221 is an apocalyptic number.

It is an amenable number.

11204221 is a deficient number, since it is larger than the sum of its proper divisors (1600611).

11204221 is an equidigital number, since it uses as much as digits as its factorization.

11204221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1600610.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 11204221 is about 3347.2706792251. The cubic root of 11204221 is about 223.7658919457.

Adding to 11204221 its reverse (12240211), we get a palindrome (23444432).

The spelling of 11204221 in words is "eleven million, two hundred four thousand, two hundred twenty-one".