21211002022200 has 96 divisors (see below), whose sum is σ = 65896124640000. Its totient is φ = 5644050572160.

The previous prime is 21211002022193. The next prime is 21211002022207. The reversal of 21211002022200 is 222020011212.

It is an interprime number because it is at equal distance from previous prime (21211002022193) and next prime (21211002022207).

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 21211002022200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211002022207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37898950 + ... + 38454549.

It is an arithmetic number, because the mean of its divisors is an integer number (686417965000).

Almost surely, 2^{21211002022200} is an apocalyptic number.

21211002022200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21211002022200 is an abundant number, since it is smaller than the sum of its proper divisors (44685122617800).

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

21211002022200 is a wasteful number, since it uses less digits than its factorization.

21211002022200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76353981 (or 76353972 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21211002022200 its reverse (222020011212), we get a palindrome (21433022033412).

The spelling of 21211002022200 in words is "twenty-one trillion, two hundred eleven billion, two million, twenty-two thousand, two hundred".