202221201221 has 8 divisors (see below), whose sum is σ = 219491457024. Its totient is φ = 185195913840.

The previous prime is 202221201191. The next prime is 202221201257. The reversal of 202221201221 is 122102122202.

It is a happy number.

202221201221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 202221201221 - 2⁶ = 202221201157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 202221201221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202221204221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61240385 + ... + 61243686.

It is an arithmetic number, because the mean of its divisors is an integer number (27436432128).

Almost surely, 2^202221201221 is an apocalyptic number.

It is an amenable number.

202221201221 is a deficient number, since it is larger than the sum of its proper divisors (17270255803).

202221201221 is a wasteful number, since it uses less digits than its factorization.

202221201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122484211.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 202221201221 its reverse (122102122202), we get a palindrome (324323323423).

The spelling of 202221201221 in words is "two hundred two billion, two hundred twenty-one million, two hundred one thousand, two hundred twenty-one".