22122220222100 has 18 divisors (see below), whose sum is σ = 48005217882174. Its totient is φ = 8848888088800.

The previous prime is 22122220222019. The next prime is 22122220222129. The reversal of 22122220222100 is 122202222122.

It can be written as a sum of positive squares in 3 ways, for example, as 3158390078596 + 18963830143504 = 1777186^2 + 4354748^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 110611101011 + ... + 110611101210.

Almost surely, 2^{22122220222100} is an apocalyptic number.

22122220222100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22122220222100 is an abundant number, since it is smaller than the sum of its proper divisors (25882997660074).

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

22122220222100 is a wasteful number, since it uses less digits than its factorization.

22122220222100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221222202235 (or 221222202228 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 22122220222100 its reverse (122202222122), we get a palindrome (22244422444222).

The spelling of 22122220222100 in words is "twenty-two trillion, one hundred twenty-two billion, two hundred twenty million, two hundred twenty-two thousand, one hundred".