22220222100 has 36 divisors (see below), whose sum is σ = 64290510144. Its totient is φ = 5925392480.

The previous prime is 22220222041. The next prime is 22220222131. The reversal of 22220222100 is 122202222.

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 22220222100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37033404 + ... + 37034003.

It is an arithmetic number, because the mean of its divisors is an integer number (1785847504).

Almost surely, 2^22220222100 is an apocalyptic number.

22220222100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22220222100 is an abundant number, since it is smaller than the sum of its proper divisors (42070288044).

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

22220222100 is a wasteful number, since it uses less digits than its factorization.

22220222100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74067424 (or 74067417 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 22220222100 its reverse (122202222), we get a palindrome (22342424322).

The spelling of 22220222100 in words is "twenty-two billion, two hundred twenty million, two hundred twenty-two thousand, one hundred".