21020100110200 has 192 divisors, whose sum is σ = 49421375892000. Its totient is φ = 8314037821440.

The previous prime is 21020100110167. The next prime is 21020100110209. The reversal of 21020100110200 is 201100102012.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020100110209) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10653876414 + ... + 10653878386.

Almost surely, 2^{21020100110200} is an apocalyptic number.

21020100110200 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 21020100110200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24710687946000).

21020100110200 is an abundant number, since it is smaller than the sum of its proper divisors (28401275781800).

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

21020100110200 is a wasteful number, since it uses less digits than its factorization.

21020100110200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3474 (or 3465 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21020100110200 its reverse (201100102012), we get a palindrome (21221200212212).

The spelling of 21020100110200 in words is "twenty-one trillion, twenty billion, one hundred million, one hundred ten thousand, two hundred".