21002220200100 has 144 divisors (see below), whose sum is σ = 64483162813440. Its totient is φ = 5266289846400.

The previous prime is 21002220200029. The next prime is 21002220200183. The reversal of 21002220200100 is 100202220012.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25387816 + ... + 26202015.

It is an arithmetic number, because the mean of its divisors is an integer number (447799741760).

Almost surely, 2^{21002220200100} is an apocalyptic number.

21002220200100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21002220200100 is an abundant number, since it is smaller than the sum of its proper divisors (43480942613340).

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

21002220200100 is a wasteful number, since it uses less digits than its factorization.

21002220200100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51589930 (or 51589923 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21002220200100 its reverse (100202220012), we get a palindrome (21102422420112).

The spelling of 21002220200100 in words is "twenty-one trillion, two billion, two hundred twenty million, two hundred thousand, one hundred".