202121110220 has 24 divisors (see below), whose sum is σ = 424469346000. Its totient is φ = 80845584192.

The previous prime is 202121110181. The next prime is 202121110237. The reversal of 202121110220 is 22011121202.

202121110220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 202121110195 and 202121110204.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455711 + ... + 782249.

It is an arithmetic number, because the mean of its divisors is an integer number (17686222750).

Almost surely, 2^202121110220 is an apocalyptic number.

202121110220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202121110220 is an abundant number, since it is smaller than the sum of its proper divisors (222348235780).

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

202121110220 is a wasteful number, since it uses less digits than its factorization.

202121110220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357497 (or 357495 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 202121110220 its reverse (22011121202), we get a palindrome (224132231422).

The spelling of 202121110220 in words is "two hundred two billion, one hundred twenty-one million, one hundred ten thousand, two hundred twenty".