22110221 has 12 divisors (see below), whose sum is σ = 25800480. Its totient is φ = 18892440.

The previous prime is 22110173. The next prime is 22110229. The reversal of 22110221 is 12201122.

It is a happy number.

It is not a de Polignac number, because 22110221 - 2⁶ = 22110157 is a prime.

It is a super-4 number, since 4×22110221⁴ (a number of 30 digits) contains 4444 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22110229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23600 + ... + 24518.

It is an arithmetic number, because the mean of its divisors is an integer number (2150040).

Almost surely, 2^22110221 is an apocalyptic number.

It is an amenable number.

22110221 is a deficient number, since it is larger than the sum of its proper divisors (3690259).

22110221 is an equidigital number, since it uses as much as digits as its factorization.

22110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1424 (or 1417 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 22110221 is about 4702.1506781472. The cubic root of 22110221 is about 280.6710985722.

Adding to 22110221 its reverse (12201122), we get a palindrome (34311343).

Subtracting from 22110221 its reverse (12201122), we obtain a palindrome (9909099).

The spelling of 22110221 in words is "twenty-two million, one hundred ten thousand, two hundred twenty-one".