12012719489 has 2 divisors, whose sum is σ = 12012719490. Its totient is φ = 12012719488.

The previous prime is 12012719419. The next prime is 12012719491. The reversal of 12012719489 is 98491721021.

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., 9862078864 + 2150640625 = 99308^2 + 46375^2 .

It is a cyclic number.

It is not a de Polignac number, because 12012719489 - 2⁸ = 12012719233 is a prime.

It is a super-2 number, since 2×12012719489² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 12012719491, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12012719419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6006359744 + 6006359745.

It is an arithmetic number, because the mean of its divisors is an integer number (6006359745).

Almost surely, 2^12012719489 is an apocalyptic number.

It is an amenable number.

12012719489 is a deficient number, since it is larger than the sum of its proper divisors (1).

12012719489 is an equidigital number, since it uses as much as digits as its factorization.

12012719489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 44.

The spelling of 12012719489 in words is "twelve billion, twelve million, seven hundred nineteen thousand, four hundred eighty-nine".