12043315220221 has 2 divisors, whose sum is σ = 12043315220222. Its totient is φ = 12043315220220.

The previous prime is 12043315220203. The next prime is 12043315220227. The reversal of 12043315220221 is 12202251334021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8925933016900 + 3117382203321 = 2987630^2 + 1765611^2 .

It is a cyclic number.

It is not a de Polignac number, because 12043315220221 - 2⁹ = 12043315219709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12043315220221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12043315220227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6021657610110 + 6021657610111.

It is an arithmetic number, because the mean of its divisors is an integer number (6021657610111).

Almost surely, 2^{12043315220221} is an apocalyptic number.

It is an amenable number.

12043315220221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12043315220221 is an equidigital number, since it uses as much as digits as its factorization.

12043315220221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 12043315220221 its reverse (12202251334021), we get a palindrome (24245566554242).

The spelling of 12043315220221 in words is "twelve trillion, forty-three billion, three hundred fifteen million, two hundred twenty thousand, two hundred twenty-one".