12735148021 has 2 divisors, whose sum is σ = 12735148022. Its totient is φ = 12735148020.

The previous prime is 12735148003. The next prime is 12735148051. The reversal of 12735148021 is 12084153721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12285283921 + 449864100 = 110839^2 + 21210^2 .

It is an emirp because it is prime and its reverse (12084153721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12735148021 - 2⁵ = 12735147989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12735148051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6367574010 + 6367574011.

It is an arithmetic number, because the mean of its divisors is an integer number (6367574011).

Almost surely, 2^12735148021 is an apocalyptic number.

It is an amenable number.

12735148021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12735148021 is an equidigital number, since it uses as much as digits as its factorization.

12735148021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 34.

The spelling of 12735148021 in words is "twelve billion, seven hundred thirty-five million, one hundred forty-eight thousand, twenty-one".