21210002022200 has 96 divisors (see below), whose sum is σ = 50415181034400. Its totient is φ = 8295514805760.

The previous prime is 21210002022197. The next prime is 21210002022203. The reversal of 21210002022200 is 222020001212.

It is an interprime number because it is at equal distance from previous prime (21210002022197) and next prime (21210002022203).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210002022203) 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, 308780 + ... + 6520379.

It is an arithmetic number, because the mean of its divisors is an integer number (525158135775).

Almost surely, 2^{21210002022200} is an apocalyptic number.

21210002022200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21210002022200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25207590517200).

21210002022200 is an abundant number, since it is smaller than the sum of its proper divisors (29205179012200).

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

21210002022200 is a wasteful number, since it uses less digits than its factorization.

21210002022200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6829521 (or 6829512 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21210002022200 its reverse (222020001212), we get a palindrome (21432022023412).

The spelling of 21210002022200 in words is "twenty-one trillion, two hundred ten billion, two million, twenty-two thousand, two hundred".