202020221 has 8 divisors (see below), whose sum is σ = 218948184. Its totient is φ = 185290560.

The previous prime is 202020193. The next prime is 202020253. The reversal of 202020221 is 122020202.

202020221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5712100 + 196308121 = 2390^2 + 14011^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 202020221 - 2¹⁰ = 202019197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202020271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47450 + ... + 51531.

It is an arithmetic number, because the mean of its divisors is an integer number (27368523).

Almost surely, 2^202020221 is an apocalyptic number.

It is an amenable number.

202020221 is a deficient number, since it is larger than the sum of its proper divisors (16927963).

202020221 is a wasteful number, since it uses less digits than its factorization.

202020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99151.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 202020221 is about 14213.3817580476. The cubic root of 202020221 is about 586.7660087382.

Adding to 202020221 its reverse (122020202), we get a palindrome (324040423).

The spelling of 202020221 in words is "two hundred two million, twenty thousand, two hundred twenty-one".