21021102201200 has 240 divisors, whose sum is σ = 53804116566144. Its totient is φ = 7865115033600.

The previous prime is 21021102201163. The next prime is 21021102201241. The reversal of 21021102201200 is 210220112012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 747775145 + ... + 747803255.

Almost surely, 2^{21021102201200} is an apocalyptic number.

21021102201200 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 21021102201200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26902058283072).

21021102201200 is an abundant number, since it is smaller than the sum of its proper divisors (32783014364944).

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

21021102201200 is a wasteful number, since it uses less digits than its factorization.

21021102201200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28820 (or 28809 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21021102201200 its reverse (210220112012), we get a palindrome (21231322313212).

The spelling of 21021102201200 in words is "twenty-one trillion, twenty-one billion, one hundred two million, two hundred one thousand, two hundred".