21020010200220 has 96 divisors (see below), whose sum is σ = 59432034106368. Its totient is φ = 5550524151552.

The previous prime is 21020010200107. The next prime is 21020010200263. The reversal of 21020010200220 is 2200201002012.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 21020010200196 and 21020010200205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14007117 + ... + 15435003.

It is an arithmetic number, because the mean of its divisors is an integer number (619083688608).

Almost surely, 2^{21020010200220} is an apocalyptic number.

21020010200220 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 21020010200220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29716017053184).

21020010200220 is an abundant number, since it is smaller than the sum of its proper divisors (38412023906148).

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

21020010200220 is a wasteful number, since it uses less digits than its factorization.

21020010200220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430299 (or 1430297 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21020010200220 its reverse (2200201002012), we get a palindrome (23220211202232).

The spelling of 21020010200220 in words is "twenty-one trillion, twenty billion, ten million, two hundred thousand, two hundred twenty".