20021100212200 has 96 divisors (see below), whose sum is σ = 46824498040320. Its totient is φ = 7961109440000.

The previous prime is 20021100212177. The next prime is 20021100212219. The reversal of 20021100212200 is 221200112002.

It is a happy 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, 56397255 + ... + 56751145.

It is an arithmetic number, because the mean of its divisors is an integer number (487755187920).

Almost surely, 2^{20021100212200} is an apocalyptic number.

20021100212200 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 20021100212200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23412249020160).

20021100212200 is an abundant number, since it is smaller than the sum of its proper divisors (26803397828120).

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

20021100212200 is a wasteful number, since it uses less digits than its factorization.

20021100212200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355579 (or 355570 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20021100212200 its reverse (221200112002), we get a palindrome (20242300324202).

The spelling of 20021100212200 in words is "twenty trillion, twenty-one billion, one hundred million, two hundred twelve thousand, two hundred".