21011323330200 has 192 divisors, whose sum is σ = 74479180527360. Its totient is φ = 4800067960320.

The previous prime is 21011323330189. The next prime is 21011323330259. The reversal of 21011323330200 is 203332311012.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 6697734 + ... + 9321066.

It is an arithmetic number, because the mean of its divisors is an integer number (387912398580).

Almost surely, 2^{21011323330200} is an apocalyptic number.

21011323330200 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 21011323330200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37239590263680).

21011323330200 is an abundant number, since it is smaller than the sum of its proper divisors (53467857197160).

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

21011323330200 is a wasteful number, since it uses less digits than its factorization.

21011323330200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2625266 (or 2625257 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21011323330200 its reverse (203332311012), we get a palindrome (21214655641212).

The spelling of 21011323330200 in words is "twenty-one trillion, eleven billion, three hundred twenty-three million, three hundred thirty thousand, two hundred".