22121211100 has 18 divisors (see below), whose sum is σ = 48003028304. Its totient is φ = 8848484400.

The previous prime is 22121211071. The next prime is 22121211103. The reversal of 22121211100 is 111212122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121211103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 110605956 + ... + 110606155.

Almost surely, 2^22121211100 is an apocalyptic number.

22121211100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121211100 is an abundant number, since it is smaller than the sum of its proper divisors (25881817204).

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

22121211100 is a wasteful number, since it uses less digits than its factorization.

22121211100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221212125 (or 221212118 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 22121211100 its reverse (111212122), we get a palindrome (22232423222).

The spelling of 22121211100 in words is "twenty-two billion, one hundred twenty-one million, two hundred eleven thousand, one hundred".