12511117047 has 16 divisors (see below), whose sum is σ = 19597834368. Its totient is φ = 6999226080.

The previous prime is 12511117043. The next prime is 12511117049. The reversal of 12511117047 is 74071111521.

It is not a de Polignac number, because 12511117047 - 2² = 12511117043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12511117043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14581293 + ... + 14582150.

It is an arithmetic number, because the mean of its divisors is an integer number (1224864648).

Almost surely, 2^12511117047 is an apocalyptic number.

12511117047 is a deficient number, since it is larger than the sum of its proper divisors (7086717321).

12511117047 is a wasteful number, since it uses less digits than its factorization.

12511117047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29163470.

The product of its (nonzero) digits is 1960, while the sum is 30.

Adding to 12511117047 its reverse (74071111521), we get a palindrome (86582228568).

The spelling of 12511117047 in words is "twelve billion, five hundred eleven million, one hundred seventeen thousand, forty-seven".