202020211220 has 48 divisors (see below), whose sum is σ = 439072598160. Its totient is φ = 77985847296.

The previous prime is 202020211213. The next prime is 202020211241. The reversal of 202020211220 is 22112020202.

It can be written as a sum of positive squares in 8 ways, for example, as 8346284164 + 193673927056 = 91358^2 + 440084^2 .

It is a junction number, because it is equal to n+sod(n) for n = 202020211195 and 202020211204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1204844 + ... + 1362236.

It is an arithmetic number, because the mean of its divisors is an integer number (9147345795).

Almost surely, 2^202020211220 is an apocalyptic number.

202020211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202020211220 is an abundant number, since it is smaller than the sum of its proper divisors (237052386940).

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

202020211220 is a wasteful number, since it uses less digits than its factorization.

202020211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159644 (or 159642 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 202020211220 its reverse (22112020202), we get a palindrome (224132231422).

The spelling of 202020211220 in words is "two hundred two billion, twenty million, two hundred eleven thousand, two hundred twenty".