21210032200 has 288 divisors, whose sum is σ = 58739320800. Its totient is φ = 7100405760.

The previous prime is 21210032191. The next prime is 21210032237. The reversal of 21210032200 is 223001212.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 118491711 + ... + 118491889.

It is an arithmetic number, because the mean of its divisors is an integer number (203955975).

Almost surely, 2^21210032200 is an apocalyptic number.

21210032200 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 21210032200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29369660400).

21210032200 is an abundant number, since it is smaller than the sum of its proper divisors (37529288600).

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

21210032200 is a wasteful number, since it uses less digits than its factorization.

21210032200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429 (or 413 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21210032200 its reverse (223001212), we get a palindrome (21433033412).

The spelling of 21210032200 in words is "twenty-one billion, two hundred ten million, thirty-two thousand, two hundred".