12515044123 has 2 divisors, whose sum is σ = 12515044124. Its totient is φ = 12515044122.

The previous prime is 12515044121. The next prime is 12515044141. The reversal of 12515044123 is 32144051521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12515044123 - 2¹ = 12515044121 is a prime.

Together with 12515044121, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 12515044091 and 12515044100.

It is not a weakly prime, because it can be changed into another prime (12515044121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6257522061 + 6257522062.

It is an arithmetic number, because the mean of its divisors is an integer number (6257522062).

Almost surely, 2^12515044123 is an apocalyptic number.

12515044123 is a deficient number, since it is larger than the sum of its proper divisors (1).

12515044123 is an equidigital number, since it uses as much as digits as its factorization.

12515044123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 12515044123 its reverse (32144051521), we get a palindrome (44659095644).

The spelling of 12515044123 in words is "twelve billion, five hundred fifteen million, forty-four thousand, one hundred twenty-three".