12081289889 has 2 divisors, whose sum is σ = 12081289890. Its totient is φ = 12081289888.

The previous prime is 12081289873. The next prime is 12081289937. The reversal of 12081289889 is 98898218021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12060432400 + 20857489 = 109820^2 + 4567^2 .

It is an emirp because it is prime and its reverse (98898218021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12081289889 - 2⁴ = 12081289873 is a prime.

It is not a weakly prime, because it can be changed into another prime (12081283889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6040644944 + 6040644945.

It is an arithmetic number, because the mean of its divisors is an integer number (6040644945).

Almost surely, 2^12081289889 is an apocalyptic number.

It is an amenable number.

12081289889 is a deficient number, since it is larger than the sum of its proper divisors (1).

12081289889 is an equidigital number, since it uses as much as digits as its factorization.

12081289889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1327104, while the sum is 56.

The spelling of 12081289889 in words is "twelve billion, eighty-one million, two hundred eighty-nine thousand, eight hundred eighty-nine".