202221001221 has 16 divisors (see below), whose sum is σ = 285933898368. Its totient is φ = 126685798400.

The previous prime is 202221001219. The next prime is 202221001243. The reversal of 202221001221 is 122100122202.

202221001221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 202221001221 - 2¹ = 202221001219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 202221001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202221001261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3060225 + ... + 3125606.

It is an arithmetic number, because the mean of its divisors is an integer number (17870868648).

Almost surely, 2^202221001221 is an apocalyptic number.

It is an amenable number.

202221001221 is a deficient number, since it is larger than the sum of its proper divisors (83712897147).

202221001221 is a wasteful number, since it uses less digits than its factorization.

202221001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6186492.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 202221001221 its reverse (122100122202), we get a palindrome (324321123423).

The spelling of 202221001221 in words is "two hundred two billion, two hundred twenty-one million, one thousand, two hundred twenty-one".