21210333200 has 480 divisors, whose sum is σ = 64630863360. Its totient is φ = 6528614400.

The previous prime is 21210333197. The next prime is 21210333227. The reversal of 21210333200 is 233301212.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 76571462 + ... + 76571738.

It is an arithmetic number, because the mean of its divisors is an integer number (134647632).

Almost surely, 2^21210333200 is an apocalyptic number.

21210333200 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 21210333200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32315431680).

21210333200 is an abundant number, since it is smaller than the sum of its proper divisors (43420530160).

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

21210333200 is a wasteful number, since it uses less digits than its factorization.

21210333200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395 (or 384 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21210333200 its reverse (233301212), we get a palindrome (21443634412).

The spelling of 21210333200 in words is "twenty-one billion, two hundred ten million, three hundred thirty-three thousand, two hundred".