22222021110 has 64 divisors (see below), whose sum is σ = 55203379200. Its totient is φ = 5718269312.

The previous prime is 22222021109. The next prime is 22222021117. The reversal of 22222021110 is 1112022222.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 22222021110.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222021117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1767667 + ... + 1780193.

It is an arithmetic number, because the mean of its divisors is an integer number (862552800).

Almost surely, 2^22222021110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22222021110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27601689600).

22222021110 is an abundant number, since it is smaller than the sum of its proper divisors (32981358090).

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

22222021110 is a wasteful number, since it uses less digits than its factorization.

22222021110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14605.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 22222021110 its reverse (1112022222), we get a palindrome (23334043332).

The spelling of 22222021110 in words is "twenty-two billion, two hundred twenty-two million, twenty-one thousand, one hundred ten".