202222221 has 8 divisors (see below), whose sum is σ = 269711904. Its totient is φ = 134773680.

The previous prime is 202222217. The next prime is 202222243. The reversal of 202222221 is 122222202.

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

It is not a de Polignac number, because 202222221 - 2² = 202222217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 202222221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202222121) 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, 4035 + ... + 20511.

It is an arithmetic number, because the mean of its divisors is an integer number (33713988).

Almost surely, 2^202222221 is an apocalyptic number.

It is an amenable number.

202222221 is a deficient number, since it is larger than the sum of its proper divisors (67489683).

202222221 is a wasteful number, since it uses less digits than its factorization.

202222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20571.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 202222221 is about 14220.4859621604. The cubic root of 202222221 is about 586.9615126835.

Adding to 202222221 its reverse (122222202), we get a palindrome (324444423).

The spelling of 202222221 in words is "two hundred two million, two hundred twenty-two thousand, two hundred twenty-one".