12122102022221 has 4 divisors (see below), whose sum is σ = 12127388593212. Its totient is φ = 12116815451232.

The previous prime is 12122102022181. The next prime is 12122102022227. The reversal of 12122102022221 is 12222020122121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8238794308900 + 3883307713321 = 2870330^2 + 1970611^2 .

It is a cyclic number.

It is not a de Polignac number, because 12122102022221 - 2⁶ = 12122102022157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12122102022193 and 12122102022202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122102022227) 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, 2643282056 + ... + 2643286641.

It is an arithmetic number, because the mean of its divisors is an integer number (3031847148303).

Almost surely, 2^{12122102022221} is an apocalyptic number.

It is an amenable number.

12122102022221 is a deficient number, since it is larger than the sum of its proper divisors (5286570991).

12122102022221 is an equidigital number, since it uses as much as digits as its factorization.

12122102022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5286570990.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 12122102022221 its reverse (12222020122121), we get a palindrome (24344122144342).

The spelling of 12122102022221 in words is "twelve trillion, one hundred twenty-two billion, one hundred two million, twenty-two thousand, two hundred twenty-one".