20200221021100 has 36 divisors (see below), whose sum is σ = 43835481849600. Its totient is φ = 8079903664960.

The previous prime is 20200221021091. The next prime is 20200221021131. The reversal of 20200221021100 is 112012200202.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2128686 + ... + 6703114.

It is an arithmetic number, because the mean of its divisors is an integer number (1217652273600).

Almost surely, 2^{20200221021100} is an apocalyptic number.

20200221021100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20200221021100 is an abundant number, since it is smaller than the sum of its proper divisors (23635260828500).

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

20200221021100 is a wasteful number, since it uses less digits than its factorization.

20200221021100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4618602 (or 4618595 counting only the distinct ones).

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

Adding to 20200221021100 its reverse (112012200202), we get a palindrome (20312233221302).

The spelling of 20200221021100 in words is "twenty trillion, two hundred billion, two hundred twenty-one million, twenty-one thousand, one hundred".