12117925517 has 2 divisors, whose sum is σ = 12117925518. Its totient is φ = 12117925516.

The previous prime is 12117925511. The next prime is 12117925531. The reversal of 12117925517 is 71552971121.

12117925517 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 can be written as a sum of positive squares in only one way, i.e., 11531752996 + 586172521 = 107386^2 + 24211^2 .

It is a cyclic number.

It is not a de Polignac number, because 12117925517 - 2¹⁸ = 12117663373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12117925511) 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, 6058962758 + 6058962759.

It is an arithmetic number, because the mean of its divisors is an integer number (6058962759).

Almost surely, 2^12117925517 is an apocalyptic number.

It is an amenable number.

12117925517 is a deficient number, since it is larger than the sum of its proper divisors (1).

12117925517 is an equidigital number, since it uses as much as digits as its factorization.

12117925517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44100, while the sum is 41.

The spelling of 12117925517 in words is "twelve billion, one hundred seventeen million, nine hundred twenty-five thousand, five hundred seventeen".