12505115514123 has 8 divisors (see below), whose sum is σ = 18526097058000. Its totient is φ = 8336743676064.

The previous prime is 12505115514079. The next prime is 12505115514211. The reversal of 12505115514123 is 32141551150521.

12505115514123 is a `hidden beast` number, since 1 + 2 + 5 + 0 + 5 + 1 + 15 + 514 + 123 = 666.

It is not a de Polignac number, because 12505115514123 - 2⁸ = 12505115513867 is a prime.

It is a super-2 number, since 2×12505115514123² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12505115514523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231576213198 + ... + 231576213251.

It is an arithmetic number, because the mean of its divisors is an integer number (2315762132250).

Almost surely, 2^{12505115514123} is an apocalyptic number.

12505115514123 is a deficient number, since it is larger than the sum of its proper divisors (6020981543877).

12505115514123 is an equidigital number, since it uses as much as digits as its factorization.

12505115514123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463152426458 (or 463152426452 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 36.

Adding to 12505115514123 its reverse (32141551150521), we get a palindrome (44646666664644).

The spelling of 12505115514123 in words is "twelve trillion, five hundred five billion, one hundred fifteen million, five hundred fourteen thousand, one hundred twenty-three".