12001223022121 has 2 divisors, whose sum is σ = 12001223022122. Its totient is φ = 12001223022120.

The previous prime is 12001223022079. The next prime is 12001223022143. The reversal of 12001223022121 is 12122032210021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9210836524096 + 2790386498025 = 3034936^2 + 1670445^2 .

It is a cyclic number.

It is not a de Polignac number, because 12001223022121 - 2³³ = 11992633087529 is a prime.

It is not a weakly prime, because it can be changed into another prime (12001223022161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6000611511060 + 6000611511061.

It is an arithmetic number, because the mean of its divisors is an integer number (6000611511061).

Almost surely, 2^{12001223022121} is an apocalyptic number.

It is an amenable number.

12001223022121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12001223022121 is an equidigital number, since it uses as much as digits as its factorization.

12001223022121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 12001223022121 its reverse (12122032210021), we get a palindrome (24123255232142).

The spelling of 12001223022121 in words is "twelve trillion, one billion, two hundred twenty-three million, twenty-two thousand, one hundred twenty-one".