12521113511 has 2 divisors, whose sum is σ = 12521113512. Its totient is φ = 12521113510.

The previous prime is 12521113499. The next prime is 12521113523. The reversal of 12521113511 is 11531112521.

12521113511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (12521113499) and next prime (12521113523).

It is a cyclic number.

It is not a de Polignac number, because 12521113511 - 2⁶ = 12521113447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12521113711) 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, 6260556755 + 6260556756.

It is an arithmetic number, because the mean of its divisors is an integer number (6260556756).

Almost surely, 2^12521113511 is an apocalyptic number.

12521113511 is a deficient number, since it is larger than the sum of its proper divisors (1).

12521113511 is an equidigital number, since it uses as much as digits as its factorization.

12521113511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 300, while the sum is 23.

The spelling of 12521113511 in words is "twelve billion, five hundred twenty-one million, one hundred thirteen thousand, five hundred eleven".