22441221 has 24 divisors (see below), whose sum is σ = 35511840. Its totient is φ = 13543200.

The previous prime is 22441193. The next prime is 22441249. The reversal of 22441221 is 12214422.

22441221 is a `hidden beast` number, since 2 + 2 + 441 + 221 = 666.

It is an interprime number because it is at equal distance from previous prime (22441193) and next prime (22441249).

It is not a de Polignac number, because 22441221 - 2⁵ = 22441189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22441194 and 22441203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22441271) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41211 + ... + 41751.

It is an arithmetic number, because the mean of its divisors is an integer number (1479660).

Almost surely, 2^22441221 is an apocalyptic number.

It is an amenable number.

22441221 is a deficient number, since it is larger than the sum of its proper divisors (13070619).

22441221 is a wasteful number, since it uses less digits than its factorization.

22441221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977 (or 974 counting only the distinct ones).

The product of its digits is 256, while the sum is 18.

The square root of 22441221 is about 4737.2165878288. The cubic root of 22441221 is about 282.0647580267.

Adding to 22441221 its reverse (12214422), we get a palindrome (34655643).

The spelling of 22441221 in words is "twenty-two million, four hundred forty-one thousand, two hundred twenty-one".