12087594221 has 2 divisors, whose sum is σ = 12087594222. Its totient is φ = 12087594220.

The previous prime is 12087594217. The next prime is 12087594229. The reversal of 12087594221 is 12249578021.

12087594221 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., 8069428900 + 4018165321 = 89830^2 + 63389^2 .

It is a cyclic number.

It is not a de Polignac number, because 12087594221 - 2² = 12087594217 is a prime.

It is a super-2 number, since 2×12087594221² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12087594229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6043797110 + 6043797111.

It is an arithmetic number, because the mean of its divisors is an integer number (6043797111).

Almost surely, 2^12087594221 is an apocalyptic number.

It is an amenable number.

12087594221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12087594221 is an equidigital number, since it uses as much as digits as its factorization.

12087594221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 41.

The spelling of 12087594221 in words is "twelve billion, eighty-seven million, five hundred ninety-four thousand, two hundred twenty-one".