22111111100 has 72 divisors (see below), whose sum is σ = 52399958688. Its totient is φ = 8049081600.

The previous prime is 22111111097. The next prime is 22111111123. The reversal of 22111111100 is 111111122.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27479 + ... + 212078.

It is an arithmetic number, because the mean of its divisors is an integer number (727777204).

Almost surely, 2^22111111100 is an apocalyptic number.

22111111100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22111111100 is an abundant number, since it is smaller than the sum of its proper divisors (30288847588).

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

22111111100 is a wasteful number, since it uses less digits than its factorization.

22111111100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239655 (or 239648 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 22111111100 its reverse (111111122), we get a palindrome (22222222222).

The spelling of 22111111100 in words is "twenty-two billion, one hundred eleven million, one hundred eleven thousand, one hundred".