12122020321 has 2 divisors, whose sum is σ = 12122020322. Its totient is φ = 12122020320.

The previous prime is 12122020283. The next prime is 12122020343. The reversal of 12122020321 is 12302022121.

It is a happy number.

12122020321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7849960000 + 4272060321 = 88600^2 + 65361^2 .

It is a cyclic number.

It is not a de Polignac number, because 12122020321 - 2¹¹ = 12122018273 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12122020295 and 12122020304.

It is not a weakly prime, because it can be changed into another prime (12122020381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061010160 + 6061010161.

It is an arithmetic number, because the mean of its divisors is an integer number (6061010161).

Almost surely, 2^12122020321 is an apocalyptic number.

It is an amenable number.

12122020321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12122020321 is an equidigital number, since it uses as much as digits as its factorization.

12122020321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 12122020321 its reverse (12302022121), we get a palindrome (24424042442).

The spelling of 12122020321 in words is "twelve billion, one hundred twenty-two million, twenty thousand, three hundred twenty-one".