12521113523 has 2 divisors, whose sum is σ = 12521113524. Its totient is φ = 12521113522.

The previous prime is 12521113511. The next prime is 12521113529. The reversal of 12521113523 is 32531112521.

12521113523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12521113523 - 2¹² = 12521109427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12521113492 and 12521113501.

It is not a weakly prime, because it can be changed into another prime (12521113529) 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, 6260556761 + 6260556762.

It is an arithmetic number, because the mean of its divisors is an integer number (6260556762).

Almost surely, 2^12521113523 is an apocalyptic number.

12521113523 is a deficient number, since it is larger than the sum of its proper divisors (1).

12521113523 is an equidigital number, since it uses as much as digits as its factorization.

12521113523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 26.

The spelling of 12521113523 in words is "twelve billion, five hundred twenty-one million, one hundred thirteen thousand, five hundred twenty-three".