22221112100 has 72 divisors (see below), whose sum is σ = 53269507200. Its totient is φ = 7978089600.

The previous prime is 22221112099. The next prime is 22221112103. The reversal of 22221112100 is 121112222.

It is not an unprimeable number, because it can be changed into a prime (22221112103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40955 + ... + 214754.

Almost surely, 2^22221112100 is an apocalyptic number.

22221112100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22221112100 is an abundant number, since it is smaller than the sum of its proper divisors (31048395100).

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

22221112100 is a wasteful number, since it uses less digits than its factorization.

22221112100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255813 (or 255806 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 22221112100 its reverse (121112222), we get a palindrome (22342224322).

The spelling of 22221112100 in words is "twenty-two billion, two hundred twenty-one million, one hundred twelve thousand, one hundred".