21020211022200 has 96 divisors (see below), whose sum is σ = 70175166054000. Its totient is φ = 5174205788160.

The previous prime is 21020211022199. The next prime is 21020211022333. The reversal of 21020211022200 is 222011202012.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21020211022200.

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, 1347441625 + ... + 1347457224.

Almost surely, 2^{21020211022200} is an apocalyptic number.

21020211022200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21020211022200 is an abundant number, since it is smaller than the sum of its proper divisors (49154955031800).

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

21020211022200 is a wasteful number, since it uses less digits than its factorization.

21020211022200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2694898881 (or 2694898872 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21020211022200 its reverse (222011202012), we get a palindrome (21242222224212).

The spelling of 21020211022200 in words is "twenty-one trillion, twenty billion, two hundred eleven million, twenty-two thousand, two hundred".