12012540376517 has 4 divisors (see below), whose sum is σ = 12216142755840. Its totient is φ = 11808937997196.

The previous prime is 12012540376481. The next prime is 12012540376547. The reversal of 12012540376517 is 71567304521021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12012540376517 - 2²⁰ = 12012539327941 is a prime.

It is a super-2 number, since 2×12012540376517² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012540376547) 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, 101801189573 + ... + 101801189690.

It is an arithmetic number, because the mean of its divisors is an integer number (3054035688960).

Almost surely, 2^{12012540376517} is an apocalyptic number.

It is an amenable number.

12012540376517 is a deficient number, since it is larger than the sum of its proper divisors (203602379323).

12012540376517 is an equidigital number, since it uses as much as digits as its factorization.

12012540376517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203602379322.

The product of its (nonzero) digits is 352800, while the sum is 44.

Adding to 12012540376517 its reverse (71567304521021), we get a palindrome (83579844897538).

The spelling of 12012540376517 in words is "twelve trillion, twelve billion, five hundred forty million, three hundred seventy-six thousand, five hundred seventeen".