21112242200 has 96 divisors (see below), whose sum is σ = 59398207200. Its totient is φ = 6812682240.

The previous prime is 21112242199. The next prime is 21112242209. The reversal of 21112242200 is 224221112.

It is a super-2 number, since 2×21112242200² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112242209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 419735 + ... + 467334.

It is an arithmetic number, because the mean of its divisors is an integer number (618731325).

Almost surely, 2^21112242200 is an apocalyptic number.

21112242200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21112242200 is an abundant number, since it is smaller than the sum of its proper divisors (38285965000).

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

21112242200 is a wasteful number, since it uses less digits than its factorization.

21112242200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887109 (or 887100 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21112242200 its reverse (224221112), we get a palindrome (21336463312).

The spelling of 21112242200 in words is "twenty-one billion, one hundred twelve million, two hundred forty-two thousand, two hundred".