202000022221 has 4 divisors (see below), whose sum is σ = 202006200700. Its totient is φ = 201993843744.

The previous prime is 202000022207. The next prime is 202000022227. The reversal of 202000022221 is 122220000202.

202000022221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122220000202 = 2 ⋅61110000101.

It can be written as a sum of positive squares in 2 ways, for example, as 86409542025 + 115590480196 = 293955^2 + 339986^2 .

It is a cyclic number.

It is not a de Polignac number, because 202000022221 - 2¹⁵ = 201999989453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202000022227) 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 3 ways as a sum of consecutive naturals, for example, 3039936 + ... + 3105673.

It is an arithmetic number, because the mean of its divisors is an integer number (50501550175).

Almost surely, 2^202000022221 is an apocalyptic number.

It is an amenable number.

202000022221 is a deficient number, since it is larger than the sum of its proper divisors (6178479).

202000022221 is an equidigital number, since it uses as much as digits as its factorization.

202000022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6178478.

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 202000022221 its reverse (122220000202), we get a palindrome (324220022423).

The spelling of 202000022221 in words is "two hundred two billion, twenty-two thousand, two hundred twenty-one".