202222121221 has 8 divisors (see below), whose sum is σ = 202752540000. Its totient is φ = 201692225520.

The previous prime is 202222121191. The next prime is 202222121267. The reversal of 202222121221 is 122121222202.

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 202222121221 - 2¹⁹ = 202221596933 is a prime.

It is a super-2 number, since 2×202222121221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202222121281) 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, 649530 + ... + 909028.

It is an arithmetic number, because the mean of its divisors is an integer number (25344067500).

Almost surely, 2^202222121221 is an apocalyptic number.

It is an amenable number.

202222121221 is a deficient number, since it is larger than the sum of its proper divisors (530418779).

202222121221 is a wasteful number, since it uses less digits than its factorization.

202222121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261539.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 202222121221 its reverse (122121222202), we get a palindrome (324343343423).

The spelling of 202222121221 in words is "two hundred two billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred twenty-one".