12129424078 has 16 divisors (see below), whose sum is σ = 19267439760. Its totient is φ = 5707057536.

The previous prime is 12129424067. The next prime is 12129424103. The reversal of 12129424078 is 87042492121.

It is a self number, because there is not a number n which added to its sum of digits gives 12129424078.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220513 + ... + 269971.

It is an arithmetic number, because the mean of its divisors is an integer number (1204214985).

Almost surely, 2^12129424078 is an apocalyptic number.

12129424078 is a deficient number, since it is larger than the sum of its proper divisors (7138015682).

12129424078 is a wasteful number, since it uses less digits than its factorization.

12129424078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56691.

The product of its (nonzero) digits is 64512, while the sum is 40.

The spelling of 12129424078 in words is "twelve billion, one hundred twenty-nine million, four hundred twenty-four thousand, seventy-eight".