21222002002200 has 96 divisors (see below), whose sum is σ = 69250743412800. Its totient is φ = 5361347871360.

The previous prime is 21222002002199. The next prime is 21222002002207. The reversal of 21222002002200 is 220020022212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21222002002200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222002002207) 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 23 ways as a sum of consecutive naturals, for example, 930778162 + ... + 930800961.

It is an arithmetic number, because the mean of its divisors is an integer number (721361910550).

Almost surely, 2^{21222002002200} is an apocalyptic number.

21222002002200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21222002002200 is an abundant number, since it is smaller than the sum of its proper divisors (48028741410600).

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

21222002002200 is a wasteful number, since it uses less digits than its factorization.

21222002002200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1861579161 (or 1861579152 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 21222002002200 its reverse (220020022212), we get a palindrome (21442022024412).

The spelling of 21222002002200 in words is "twenty-one trillion, two hundred twenty-two billion, two million, two thousand, two hundred".