202021111220 has 12 divisors (see below), whose sum is σ = 424244333604. Its totient is φ = 80808444480.

The previous prime is 202021111217. The next prime is 202021111261. The reversal of 202021111220 is 22111120202.

It can be written as a sum of positive squares in 2 ways, for example, as 142065671056 + 59955440164 = 376916^2 + 244858^2 .

It is a junction number, because it is equal to n+sod(n) for n = 202021111195 and 202021111204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5050527761 + ... + 5050527800.

It is an arithmetic number, because the mean of its divisors is an integer number (35353694467).

Almost surely, 2^202021111220 is an apocalyptic number.

202021111220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202021111220 is an abundant number, since it is smaller than the sum of its proper divisors (222223222384).

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

202021111220 is a wasteful number, since it uses less digits than its factorization.

202021111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10101055570 (or 10101055568 counting only the distinct ones).

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

Adding to 202021111220 its reverse (22111120202), we get a palindrome (224132231422).

The spelling of 202021111220 in words is "two hundred two billion, twenty-one million, one hundred eleven thousand, two hundred twenty".