21230203211200 has 168 divisors, whose sum is σ = 54106219346400. Its totient is φ = 8189345525760.

The previous prime is 21230203211183. The next prime is 21230203211219. The reversal of 21230203211200 is 211230203212.

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, 38189637 + ... + 38741563.

Almost surely, 2^{21230203211200} is an apocalyptic number.

21230203211200 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 21230203211200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27053109673200).

21230203211200 is an abundant number, since it is smaller than the sum of its proper divisors (32876016135200).

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

21230203211200 is a wasteful number, since it uses less digits than its factorization.

21230203211200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552807 (or 552792 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21230203211200 its reverse (211230203212), we get a palindrome (21441433414412).

The spelling of 21230203211200 in words is "twenty-one trillion, two hundred thirty billion, two hundred three million, two hundred eleven thousand, two hundred".