202221111221 has 8 divisors (see below), whose sum is σ = 211052446080. Its totient is φ = 193393035792.

The previous prime is 202221111167. The next prime is 202221111229. The reversal of 202221111221 is 122111122202.

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 202221111221 - 2¹⁰ = 202221110197 is a prime.

It is a super-2 number, since 2×202221111221² (a number of 23 digits) contains 22 as substring.

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 202221111221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202221111229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 687641 + ... + 936638.

It is an arithmetic number, because the mean of its divisors is an integer number (26381555760).

Almost surely, 2^202221111221 is an apocalyptic number.

It is an amenable number.

202221111221 is a deficient number, since it is larger than the sum of its proper divisors (8831334859).

202221111221 is a wasteful number, since it uses less digits than its factorization.

202221111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1629715.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 202221111221 its reverse (122111122202), we get a palindrome (324332233423).

The spelling of 202221111221 in words is "two hundred two billion, two hundred twenty-one million, one hundred eleven thousand, two hundred twenty-one".