21021012003200 has 192 divisors, whose sum is σ = 59630779368000. Its totient is φ = 7241688115200.

The previous prime is 21021012003133. The next prime is 21021012003209. The reversal of 21021012003200 is 230021012012.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021012003209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15046670 + ... + 16384269.

It is an arithmetic number, because the mean of its divisors is an integer number (310576975875).

Almost surely, 2^{21021012003200} is an apocalyptic number.

21021012003200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21021012003200 is an abundant number, since it is smaller than the sum of its proper divisors (38609767364800).

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

21021012003200 is a wasteful number, since it uses less digits than its factorization.

21021012003200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31430993 (or 31430976 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21021012003200 its reverse (230021012012), we get a palindrome (21251033015212).

The spelling of 21021012003200 in words is "twenty-one trillion, twenty-one billion, twelve million, three thousand, two hundred".