202221221 has 8 divisors (see below), whose sum is σ = 211840704. Its totient is φ = 192670720.

The previous prime is 202221203. The next prime is 202221233. The reversal of 202221221 is 122122202.

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

It is a cyclic number.

It is not a de Polignac number, because 202221221 - 2¹⁴ = 202204837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202221196 and 202221205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202221251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11195 + ... + 23016.

It is an arithmetic number, because the mean of its divisors is an integer number (26480088).

Almost surely, 2^202221221 is an apocalyptic number.

It is an amenable number.

202221221 is a deficient number, since it is larger than the sum of its proper divisors (9619483).

202221221 is a wasteful number, since it uses less digits than its factorization.

202221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34491.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 202221221 is about 14220.4508015745. The cubic root of 202221221 is about 586.9605451629.

Adding to 202221221 its reverse (122122202), we get a palindrome (324343423).

The spelling of 202221221 in words is "two hundred two million, two hundred twenty-one thousand, two hundred twenty-one".