21102000220000 has 240 divisors, whose sum is σ = 61376270931360. Its totient is φ = 6985488384000.

The previous prime is 21102000219983. The next prime is 21102000220003. The reversal of 21102000220000 is 2200020112.

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 (21102000220003) 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 39 ways as a sum of consecutive naturals, for example, 1461232 + ... + 6658768.

It is an arithmetic number, because the mean of its divisors is an integer number (255734462214).

Almost surely, 2^{21102000220000} is an apocalyptic number.

21102000220000 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 21102000220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30688135465680).

21102000220000 is an abundant number, since it is smaller than the sum of its proper divisors (40274270711360).

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

21102000220000 is an equidigital number, since it uses as much as digits as its factorization.

21102000220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5197603 (or 5197580 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 21102000220000 its reverse (2200020112), we get a palindrome (21104200240112).

The spelling of 21102000220000 in words is "twenty-one trillion, one hundred two billion, two hundred twenty thousand".