21200210202020 has 24 divisors (see below), whose sum is σ = 44654944282368. Its totient is φ = 8454464488800.

The previous prime is 21200210201999. The next prime is 21200210202047. The reversal of 21200210202020 is 2020201200212.

It is a junction number, because it is equal to n+sod(n) for n = 21200210201986 and 21200210202004.

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 7 ways as a sum of consecutive naturals, for example, 1601217716 + ... + 1601230955.

It is an arithmetic number, because the mean of its divisors is an integer number (1860622678432).

Almost surely, 2^{21200210202020} is an apocalyptic number.

21200210202020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21200210202020 is an abundant number, since it is smaller than the sum of its proper divisors (23454734080348).

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

21200210202020 is a wasteful number, since it uses less digits than its factorization.

21200210202020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3202449011 (or 3202449009 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21200210202020 its reverse (2020201200212), we get a palindrome (23220411402232).

The spelling of 21200210202020 in words is "twenty-one trillion, two hundred billion, two hundred ten million, two hundred two thousand, twenty".