21020021202200 has 96 divisors (see below), whose sum is σ = 50033441070000. Its totient is φ = 8210026022400.

The previous prime is 21020021202181. The next prime is 21020021202223. The reversal of 21020021202200 is 220212002012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4219511 + ... + 7735910.

Almost surely, 2^{21020021202200} is an apocalyptic number.

21020021202200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21020021202200 is an abundant number, since it is smaller than the sum of its proper divisors (29013419867800).

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

21020021202200 is a wasteful number, since it uses less digits than its factorization.

21020021202200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11955645 (or 11955636 counting only the distinct ones).

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

Adding to 21020021202200 its reverse (220212002012), we get a palindrome (21240233204212).

The spelling of 21020021202200 in words is "twenty-one trillion, twenty billion, twenty-one million, two hundred two thousand, two hundred".