21222211010200 has 96 divisors (see below), whose sum is σ = 49426505251200. Its totient is φ = 8474295997440.

The previous prime is 21222211010183. The next prime is 21222211010201. The reversal of 21222211010200 is 201011222212.

It is a happy number.

It is a super-2 number, since 2×21222211010200² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222211010201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 293619666 + ... + 293691934.

It is an arithmetic number, because the mean of its divisors is an integer number (514859429700).

Almost surely, 2^{21222211010200} is an apocalyptic number.

21222211010200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21222211010200 is an abundant number, since it is smaller than the sum of its proper divisors (28204294241000).

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

21222211010200 is a wasteful number, since it uses less digits than its factorization.

21222211010200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74789 (or 74780 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21222211010200 its reverse (201011222212), we get a palindrome (21423222232412).

The spelling of 21222211010200 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred eleven million, ten thousand, two hundred".