12122202132221 has 2 divisors, whose sum is σ = 12122202132222. Its totient is φ = 12122202132220.

The previous prime is 12122202132163. The next prime is 12122202132223. The reversal of 12122202132221 is 12223120222121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6801590976196 + 5320611156025 = 2607986^2 + 2306645^2 .

It is an emirp because it is prime and its reverse (12223120222121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12122202132221 - 2¹⁰ = 12122202131197 is a prime.

Together with 12122202132223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12122202132223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061101066110 + 6061101066111.

It is an arithmetic number, because the mean of its divisors is an integer number (6061101066111).

Almost surely, 2^{12122202132221} is an apocalyptic number.

It is an amenable number.

12122202132221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12122202132221 is an equidigital number, since it uses as much as digits as its factorization.

12122202132221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 12122202132221 its reverse (12223120222121), we get a palindrome (24345322354342).

The spelling of 12122202132221 in words is "twelve trillion, one hundred twenty-two billion, two hundred two million, one hundred thirty-two thousand, two hundred twenty-one".