12451135117 has 4 divisors (see below), whose sum is σ = 12465268956. Its totient is φ = 12437001280.

The previous prime is 12451135093. The next prime is 12451135139. The reversal of 12451135117 is 71153115421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71153115421 = 1031 ⋅69013691.

It can be written as a sum of positive squares in 2 ways, for example, as 2651323081 + 9799812036 = 51491^2 + 98994^2 .

It is a cyclic number.

It is not a de Polignac number, because 12451135117 - 2¹⁹ = 12450610829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12451135517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7065598 + ... + 7067359.

It is an arithmetic number, because the mean of its divisors is an integer number (3116317239).

Almost surely, 2^12451135117 is an apocalyptic number.

It is an amenable number.

12451135117 is a deficient number, since it is larger than the sum of its proper divisors (14133839).

12451135117 is an equidigital number, since it uses as much as digits as its factorization.

12451135117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14133838.

The product of its digits is 4200, while the sum is 31.

The spelling of 12451135117 in words is "twelve billion, four hundred fifty-one million, one hundred thirty-five thousand, one hundred seventeen".