12320121002221 has 2 divisors, whose sum is σ = 12320121002222. Its totient is φ = 12320121002220.

The previous prime is 12320121002209. The next prime is 12320121002237. The reversal of 12320121002221 is 12220012102321.

12320121002221 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., 7526709945225 + 4793411056996 = 2743485^2 + 2189386^2 .

It is a cyclic number.

It is not a de Polignac number, because 12320121002221 - 2⁷ = 12320121002093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12320121002201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6160060501110 + 6160060501111.

It is an arithmetic number, because the mean of its divisors is an integer number (6160060501111).

Almost surely, 2^{12320121002221} is an apocalyptic number.

It is an amenable number.

12320121002221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12320121002221 is an equidigital number, since it uses as much as digits as its factorization.

12320121002221 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 12320121002221 its reverse (12220012102321), we get a palindrome (24540133104542).

The spelling of 12320121002221 in words is "twelve trillion, three hundred twenty billion, one hundred twenty-one million, two thousand, two hundred twenty-one".