202222201221 has 24 divisors (see below), whose sum is σ = 295834481280. Its totient is φ = 133091053056.

The previous prime is 202222201201. The next prime is 202222201241. The reversal of 202222201221 is 122102222202.

202222201221 is a `hidden beast` number, since 2 + 0 + 222 + 220 + 1 + 221 = 666.

202222201221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (202222201201) and next prime (202222201241).

It is not a de Polignac number, because 202222201221 - 2³⁵ = 167862462853 is a prime.

It is a super-2 number, since 2×202222201221² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 202222201194 and 202222201203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202222201201) 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 23 ways as a sum of consecutive naturals, for example, 7827301 + ... + 7853093.

It is an arithmetic number, because the mean of its divisors is an integer number (12326436720).

Almost surely, 2^202222201221 is an apocalyptic number.

It is an amenable number.

202222201221 is a deficient number, since it is larger than the sum of its proper divisors (93612280059).

202222201221 is a wasteful number, since it uses less digits than its factorization.

202222201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36905 (or 36902 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 202222201221 its reverse (122102222202), we get a palindrome (324324423423).

The spelling of 202222201221 in words is "two hundred two billion, two hundred twenty-two million, two hundred one thousand, two hundred twenty-one".