21201112102200 has 96 divisors (see below), whose sum is σ = 66337685544960. Its totient is φ = 5600792214400.

The previous prime is 21201112102187. The next prime is 21201112102301. The reversal of 21201112102200 is 220121110212.

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 21201112102200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 165053496 + ... + 165181895.

It is an arithmetic number, because the mean of its divisors is an integer number (691017557760).

Almost surely, 2^{21201112102200} is an apocalyptic number.

21201112102200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21201112102200 is an abundant number, since it is smaller than the sum of its proper divisors (45136573442760).

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

21201112102200 is a wasteful number, since it uses less digits than its factorization.

21201112102200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330235517 (or 330235508 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21201112102200 its reverse (220121110212), we get a palindrome (21421233212412).

The spelling of 21201112102200 in words is "twenty-one trillion, two hundred one billion, one hundred twelve million, one hundred two thousand, two hundred".