12126516879 has 16 divisors (see below), whose sum is σ = 16370871552. Its totient is φ = 7983341568.

The previous prime is 12126516841. The next prime is 12126516881. The reversal of 12126516879 is 97861562121.

It is a happy number.

It is not a de Polignac number, because 12126516879 - 2⁷ = 12126516751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12126516839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 613519 + ... + 632975.

It is an arithmetic number, because the mean of its divisors is an integer number (1023179472).

Almost surely, 2^12126516879 is an apocalyptic number.

12126516879 is a deficient number, since it is larger than the sum of its proper divisors (4244354673).

12126516879 is a wasteful number, since it uses less digits than its factorization.

12126516879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22046.

The product of its digits is 362880, while the sum is 48.

The spelling of 12126516879 in words is "twelve billion, one hundred twenty-six million, five hundred sixteen thousand, eight hundred seventy-nine".