202010221 has 4 divisors (see below), whose sum is σ = 230868832. Its totient is φ = 173151612.

The previous prime is 202010203. The next prime is 202010231. The reversal of 202010221 is 122010202.

202010221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 202010221 - 2¹¹ = 202008173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202010198 and 202010207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202010231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14429295 + ... + 14429308.

It is an arithmetic number, because the mean of its divisors is an integer number (57717208).

Almost surely, 2^202010221 is an apocalyptic number.

It is an amenable number.

202010221 is a deficient number, since it is larger than the sum of its proper divisors (28858611).

202010221 is an equidigital number, since it uses as much as digits as its factorization.

202010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28858610.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 202010221 is about 14213.0299725287. The cubic root of 202010221 is about 586.7563269402.

Adding to 202010221 its reverse (122010202), we get a palindrome (324020423).

The spelling of 202010221 in words is "two hundred two million, ten thousand, two hundred twenty-one".