12012222220121 has 2 divisors, whose sum is σ = 12012222220122. Its totient is φ = 12012222220120.

The previous prime is 12012222220093. The next prime is 12012222220157. The reversal of 12012222220121 is 12102222221021.

12012222220121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10437008964496 + 1575213255625 = 3230636^2 + 1255075^2 .

It is a cyclic number.

It is not a de Polignac number, because 12012222220121 - 2⁴² = 7614175709017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12012222220093 and 12012222220102.

It is not a weakly prime, because it can be changed into another prime (12012222220421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6006111110060 + 6006111110061.

It is an arithmetic number, because the mean of its divisors is an integer number (6006111110061).

Almost surely, 2^{12012222220121} is an apocalyptic number.

It is an amenable number.

12012222220121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12012222220121 is an equidigital number, since it uses as much as digits as its factorization.

12012222220121 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 20.

Adding to 12012222220121 its reverse (12102222221021), we get a palindrome (24114444441142).

The spelling of 12012222220121 in words is "twelve trillion, twelve billion, two hundred twenty-two million, two hundred twenty thousand, one hundred twenty-one".