22211021100 has 216 divisors, whose sum is σ = 66316474224. Its totient is φ = 5738880000.

The previous prime is 22211021089. The next prime is 22211021167. The reversal of 22211021100 is 112011222.

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

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 112746202 + ... + 112746398.

It is an arithmetic number, because the mean of its divisors is an integer number (307020714).

Almost surely, 2^22211021100 is an apocalyptic number.

22211021100 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 22211021100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33158237112).

22211021100 is an abundant number, since it is smaller than the sum of its proper divisors (44105453124).

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

22211021100 is a wasteful number, since it uses less digits than its factorization.

22211021100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437 (or 369 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 22211021100 its reverse (112011222), we get a palindrome (22323032322).

The spelling of 22211021100 in words is "twenty-two billion, two hundred eleven million, twenty-one thousand, one hundred".