12551323112017 has 4 divisors (see below), whose sum is σ = 12615035412276. Its totient is φ = 12487610811760.

The previous prime is 12551323112011. The next prime is 12551323112023. The reversal of 12551323112017 is 71021132315521.

12551323112017 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (12551323112011) and next prime (12551323112023).

It can be written as a sum of positive squares in 2 ways, for example, as 8701266943681 + 3850056168336 = 2949791^2 + 1962156^2 .

It is a cyclic number.

It is not a de Polignac number, because 12551323112017 - 2¹⁹ = 12551322587729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12551323112011) 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, 31856149834 + ... + 31856150227.

It is an arithmetic number, because the mean of its divisors is an integer number (3153758853069).

Almost surely, 2^{12551323112017} is an apocalyptic number.

It is an amenable number.

12551323112017 is a deficient number, since it is larger than the sum of its proper divisors (63712300259).

12551323112017 is an equidigital number, since it uses as much as digits as its factorization.

12551323112017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63712300258.

The product of its (nonzero) digits is 12600, while the sum is 34.

Adding to 12551323112017 its reverse (71021132315521), we get a palindrome (83572455427538).

The spelling of 12551323112017 in words is "twelve trillion, five hundred fifty-one billion, three hundred twenty-three million, one hundred twelve thousand, seventeen".