22221120220 has 96 divisors (see below), whose sum is σ = 51149367360. Its totient is φ = 8059668480.

The previous prime is 22221120209. The next prime is 22221120221. The reversal of 22221120220 is 2202112222.

It is a junction number, because it is equal to n+sod(n) for n = 22221120194 and 22221120203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221120221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3903136 + ... + 3908824.

It is an arithmetic number, because the mean of its divisors is an integer number (532805910).

Almost surely, 2^22221120220 is an apocalyptic number.

22221120220 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 22221120220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25574683680).

22221120220 is an abundant number, since it is smaller than the sum of its proper divisors (28928247140).

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

22221120220 is a wasteful number, since it uses less digits than its factorization.

22221120220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5975 (or 5973 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 22221120220 its reverse (2202112222), we get a palindrome (24423232442).

The spelling of 22221120220 in words is "twenty-two billion, two hundred twenty-one million, one hundred twenty thousand, two hundred twenty".