12012021089 has 2 divisors, whose sum is σ = 12012021090. Its totient is φ = 12012021088.

The previous prime is 12012021079. The next prime is 12012021107. The reversal of 12012021089 is 98012021021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11737555600 + 274465489 = 108340^2 + 16567^2 .

It is an emirp because it is prime and its reverse (98012021021) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12012021089 is a prime.

It is not a weakly prime, because it can be changed into another prime (12012021079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6006010544 + 6006010545.

It is an arithmetic number, because the mean of its divisors is an integer number (6006010545).

Almost surely, 2^12012021089 is an apocalyptic number.

It is an amenable number.

12012021089 is a deficient number, since it is larger than the sum of its proper divisors (1).

12012021089 is an equidigital number, since it uses as much as digits as its factorization.

12012021089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 26.

The spelling of 12012021089 in words is "twelve billion, twelve million, twenty-one thousand, eighty-nine".