21021110100200 has 192 divisors, whose sum is σ = 58852014480000. Its totient is φ = 6821391421440.

The previous prime is 21021110100197. The next prime is 21021110100259. The reversal of 21021110100200 is 200101112012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27526724 + ... + 28280076.

It is an arithmetic number, because the mean of its divisors is an integer number (306520908750).

Almost surely, 2^{21021110100200} is an apocalyptic number.

21021110100200 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 21021110100200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29426007240000).

21021110100200 is an abundant number, since it is smaller than the sum of its proper divisors (37830904379800).

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

21021110100200 is a wasteful number, since it uses less digits than its factorization.

21021110100200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754444 (or 754435 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21021110100200 its reverse (200101112012), we get a palindrome (21221211212212).

The spelling of 21021110100200 in words is "twenty-one trillion, twenty-one billion, one hundred ten million, one hundred thousand, two hundred".