202011221 has 32 divisors (see below), whose sum is σ = 230169600. Its totient is φ = 176394240.

The previous prime is 202011209. The next prime is 202011241. The reversal of 202011221 is 122110202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 202011221 - 2²⁶ = 134902357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202011241) 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, 2269745 + ... + 2269833.

It is an arithmetic number, because the mean of its divisors is an integer number (7192800).

Almost surely, 2^202011221 is an apocalyptic number.

It is an amenable number.

202011221 is a deficient number, since it is larger than the sum of its proper divisors (28158379).

202011221 is a wasteful number, since it uses less digits than its factorization.

202011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 202011221 is about 14213.0651514724. The cubic root of 202011221 is about 586.7572951344.

Adding to 202011221 its reverse (122110202), we get a palindrome (324121423).

The spelling of 202011221 in words is "two hundred two million, eleven thousand, two hundred twenty-one".