22221120 has 112 divisors (see below), whose sum is σ = 71688960. Its totient is φ = 5830656.

The previous prime is 22221109. The next prime is 22221161. The reversal of 22221120 is 2112222.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 22221096 and 22221105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75694 + ... + 75986.

It is an arithmetic number, because the mean of its divisors is an integer number (640080).

Almost surely, 2^22221120 is an apocalyptic number.

22221120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22221120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35844480).

22221120 is an abundant number, since it is smaller than the sum of its proper divisors (49467840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22221120 is a wasteful number, since it uses less digits than its factorization.

22221120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 22221120 is about 4713.9282981395. The cubic root of 22221120 is about 281.1395734393.

Adding to 22221120 its reverse (2112222), we get a palindrome (24333342).

The spelling of 22221120 in words is "twenty-two million, two hundred twenty-one thousand, one hundred twenty".