21444122200 has 24 divisors (see below), whose sum is σ = 49857584580. Its totient is φ = 8577648800.

The previous prime is 21444122149. The next prime is 21444122257. The reversal of 21444122200 is 222144412.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53610106 + ... + 53610505.

Almost surely, 2^21444122200 is an apocalyptic number.

21444122200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21444122200 is an abundant number, since it is smaller than the sum of its proper divisors (28413462380).

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

21444122200 is a wasteful number, since it uses less digits than its factorization.

21444122200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107220627 (or 107220618 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 21444122200 its reverse (222144412), we get a palindrome (21666266612).

The spelling of 21444122200 in words is "twenty-one billion, four hundred forty-four million, one hundred twenty-two thousand, two hundred".