202122300221 has 4 divisors (see below), whose sum is σ = 202127891100. Its totient is φ = 202116709344.

The previous prime is 202122300203. The next prime is 202122300223. The reversal of 202122300221 is 122003221202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 198814324996 + 3307975225 = 445886^2 + 57515^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202122300221 is a prime.

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 202122300221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202122300223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2740856 + ... + 2813633.

It is an arithmetic number, because the mean of its divisors is an integer number (50531972775).

Almost surely, 2^202122300221 is an apocalyptic number.

It is an amenable number.

202122300221 is a deficient number, since it is larger than the sum of its proper divisors (5590879).

202122300221 is an equidigital number, since it uses as much as digits as its factorization.

202122300221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5590878.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 202122300221 its reverse (122003221202), we get a palindrome (324125521423).

The spelling of 202122300221 in words is "two hundred two billion, one hundred twenty-two million, three hundred thousand, two hundred twenty-one".