22221021122200 has 96 divisors (see below), whose sum is σ = 52151600208960. Its totient is φ = 8804514166400.

The previous prime is 22221021122191. The next prime is 22221021122203. The reversal of 22221021122200 is 222112012222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221021122203) 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 23 ways as a sum of consecutive naturals, for example, 261101655 + ... + 261186745.

It is an arithmetic number, because the mean of its divisors is an integer number (543245835510).

Almost surely, 2^{22221021122200} is an apocalyptic number.

22221021122200 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 22221021122200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26075800104480).

22221021122200 is an abundant number, since it is smaller than the sum of its proper divisors (29930579086760).

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

22221021122200 is a wasteful number, since it uses less digits than its factorization.

22221021122200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97417 (or 97408 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 22221021122200 its reverse (222112012222), we get a palindrome (22443133134422).

The spelling of 22221021122200 in words is "twenty-two trillion, two hundred twenty-one billion, twenty-one million, one hundred twenty-two thousand, two hundred".