202122222221 has 8 divisors (see below), whose sum is σ = 204132722400. Its totient is φ = 200111904400.

The previous prime is 202122222209. The next prime is 202122222257. The reversal of 202122222221 is 122222221202.

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 202122222221 - 2¹⁴ = 202122205837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202122222193 and 202122222202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202122222521) 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, 3711890 + ... + 3765948.

It is an arithmetic number, because the mean of its divisors is an integer number (25516590300).

Almost surely, 2^202122222221 is an apocalyptic number.

It is an amenable number.

202122222221 is a deficient number, since it is larger than the sum of its proper divisors (2010500179).

202122222221 is a wasteful number, since it uses less digits than its factorization.

202122222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91179.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 202122222221 its reverse (122222221202), we get a palindrome (324344443423).

It can be divided in two parts, 202 and 122222221, that multiplied together give a palindrome (24688888642).

The spelling of 202122222221 in words is "two hundred two billion, one hundred twenty-two million, two hundred twenty-two thousand, two hundred twenty-one".