11441221 has 24 divisors (see below), whose sum is σ = 13704480. Its totient is φ = 9465600.

The previous prime is 11441207. The next prime is 11441239. The reversal of 11441221 is 12214411.

It is a happy number.

It is not a de Polignac number, because 11441221 - 2⁷ = 11441093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11441195 and 11441204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11441291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 187531 + ... + 187591.

It is an arithmetic number, because the mean of its divisors is an integer number (571020).

Almost surely, 2^11441221 is an apocalyptic number.

11441221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11441221 is a deficient number, since it is larger than the sum of its proper divisors (2263259).

11441221 is a wasteful number, since it uses less digits than its factorization.

11441221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165 (or 148 counting only the distinct ones).

The product of its digits is 64, while the sum is 16.

The square root of 11441221 is about 3382.4873983505. The cubic root of 11441221 is about 225.3326503389.

Adding to 11441221 its reverse (12214411), we get a palindrome (23655632).

The spelling of 11441221 in words is "eleven million, four hundred forty-one thousand, two hundred twenty-one".