12168141521 has 2 divisors, whose sum is σ = 12168141522. Its totient is φ = 12168141520.

The previous prime is 12168141497. The next prime is 12168141553. The reversal of 12168141521 is 12514186121.

12168141521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (12168141553) can be obtained adding 12168141521 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11902810000 + 265331521 = 109100^2 + 16289^2 .

It is an emirp because it is prime and its reverse (12514186121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12168141521 - 2⁶ = 12168141457 is a prime.

It is not a weakly prime, because it can be changed into another prime (12168143521) 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, 6084070760 + 6084070761.

It is an arithmetic number, because the mean of its divisors is an integer number (6084070761).

Almost surely, 2^12168141521 is an apocalyptic number.

It is an amenable number.

12168141521 is a deficient number, since it is larger than the sum of its proper divisors (1).

12168141521 is an equidigital number, since it uses as much as digits as its factorization.

12168141521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3840, while the sum is 32.

The spelling of 12168141521 in words is "twelve billion, one hundred sixty-eight million, one hundred forty-one thousand, five hundred twenty-one".