12122202020221 has 2 divisors, whose sum is σ = 12122202020222. Its totient is φ = 12122202020220.

The previous prime is 12122202020197. The next prime is 12122202020237. The reversal of 12122202020221 is 12202020222121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8678097031321 + 3444104988900 = 2945861^2 + 1855830^2 .

It is a cyclic number.

It is not a de Polignac number, because 12122202020221 - 2²⁹ = 12121665149309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12122202020251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061101010110 + 6061101010111.

It is an arithmetic number, because the mean of its divisors is an integer number (6061101010111).

Almost surely, 2^{12122202020221} is an apocalyptic number.

It is an amenable number.

12122202020221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12122202020221 is an equidigital number, since it uses as much as digits as its factorization.

12122202020221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 12122202020221 its reverse (12202020222121), we get a palindrome (24324222242342).

The spelling of 12122202020221 in words is "twelve trillion, one hundred twenty-two billion, two hundred two million, twenty thousand, two hundred twenty-one".