12505520411 has 2 divisors, whose sum is σ = 12505520412. Its totient is φ = 12505520410.

The previous prime is 12505520393. The next prime is 12505520471. The reversal of 12505520411 is 11402550521.

12505520411 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (11402550521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12505520411 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (12505520471) 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, 6252760205 + 6252760206.

It is an arithmetic number, because the mean of its divisors is an integer number (6252760206).

Almost surely, 2^12505520411 is an apocalyptic number.

12505520411 is a deficient number, since it is larger than the sum of its proper divisors (1).

12505520411 is an equidigital number, since it uses as much as digits as its factorization.

12505520411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2000, while the sum is 26.

The spelling of 12505520411 in words is "twelve billion, five hundred five million, five hundred twenty thousand, four hundred eleven".