11233221 has 16 divisors (see below), whose sum is σ = 15445248. Its totient is φ = 7257600.

The previous prime is 11233219. The next prime is 11233231. The reversal of 11233221 is 12233211.

It is not a de Polignac number, because 11233221 - 2¹ = 11233219 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11233221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11233231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33165 + ... + 33501.

It is an arithmetic number, because the mean of its divisors is an integer number (965328).

Almost surely, 2^11233221 is an apocalyptic number.

It is an amenable number.

11233221 is a deficient number, since it is larger than the sum of its proper divisors (4212027).

11233221 is a wasteful number, since it uses less digits than its factorization.

11233221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652.

The product of its digits is 72, while the sum is 15.

The square root of 11233221 is about 3351.5997672753. The cubic root of 11233221 is about 223.9587841366.

Adding to 11233221 its reverse (12233211), we get a palindrome (23466432).

It can be divided in two parts, 112 and 33221, that added together give a palindrome (33333).

The spelling of 11233221 in words is "eleven million, two hundred thirty-three thousand, two hundred twenty-one".