202201021 has 32 divisors (see below), whose sum is σ = 244022400. Its totient is φ = 165473280.

The previous prime is 202200991. The next prime is 202201039. The reversal of 202201021 is 120102202.

It is not a de Polignac number, because 202201021 - 2¹¹ = 202198973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202200989 and 202201007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202201061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 442225 + ... + 442681.

It is an arithmetic number, because the mean of its divisors is an integer number (7625700).

Almost surely, 2^202201021 is an apocalyptic number.

It is an amenable number.

202201021 is a deficient number, since it is larger than the sum of its proper divisors (41821379).

202201021 is a wasteful number, since it uses less digits than its factorization.

202201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589.

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

The square root of 202201021 is about 14219.7405391238. The cubic root of 202201021 is about 586.9410005643.

Adding to 202201021 its reverse (120102202), we get a palindrome (322303223).

The spelling of 202201021 in words is "two hundred two million, two hundred one thousand, twenty-one".