2122202010221 has 2 divisors, whose sum is σ = 2122202010222. Its totient is φ = 2122202010220.

The previous prime is 2122202010209. The next prime is 2122202010263. The reversal of 2122202010221 is 1220102022212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1865644564996 + 256557445225 = 1365886^2 + 506515^2 .

It is a cyclic number.

It is not a de Polignac number, because 2122202010221 - 2¹⁸ = 2122201748077 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2122202010221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2122202010121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061101005110 + 1061101005111.

It is an arithmetic number, because the mean of its divisors is an integer number (1061101005111).

Almost surely, 2^{2122202010221} is an apocalyptic number.

It is an amenable number.

2122202010221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2122202010221 is an equidigital number, since it uses as much as digits as its factorization.

2122202010221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2122202010221 its reverse (1220102022212), we get a palindrome (3342304032433).

The spelling of 2122202010221 in words is "two trillion, one hundred twenty-two billion, two hundred two million, ten thousand, two hundred twenty-one".