12001201021897 has 2 divisors, whose sum is σ = 12001201021898. Its totient is φ = 12001201021896.

The previous prime is 12001201021889. The next prime is 12001201022033. The reversal of 12001201021897 is 79812010210021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9770900712336 + 2230300309561 = 3125844^2 + 1493419^2 .

It is an emirp because it is prime and its reverse (79812010210021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12001201021897 - 2³ = 12001201021889 is a prime.

It is not a weakly prime, because it can be changed into another prime (12001201021847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6000600510948 + 6000600510949.

It is an arithmetic number, because the mean of its divisors is an integer number (6000600510949).

Almost surely, 2^{12001201021897} is an apocalyptic number.

It is an amenable number.

12001201021897 is a deficient number, since it is larger than the sum of its proper divisors (1).

12001201021897 is an equidigital number, since it uses as much as digits as its factorization.

12001201021897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 34.

The spelling of 12001201021897 in words is "twelve trillion, one billion, two hundred one million, twenty-one thousand, eight hundred ninety-seven".