12321134434 has 16 divisors (see below), whose sum is σ = 21637115136. Its totient is φ = 5151693600.

The previous prime is 12321134417. The next prime is 12321134447. The reversal of 12321134434 is 43443112321.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10732122 + ... + 10733269.

It is an arithmetic number, because the mean of its divisors is an integer number (1352319696).

Almost surely, 2^12321134434 is an apocalyptic number.

12321134434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12321134434 is a deficient number, since it is larger than the sum of its proper divisors (9315980702).

12321134434 is a wasteful number, since it uses less digits than its factorization.

12321134434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21465441.

The product of its digits is 6912, while the sum is 28.

Adding to 12321134434 its reverse (43443112321), we get a palindrome (55764246755).

The spelling of 12321134434 in words is "twelve billion, three hundred twenty-one million, one hundred thirty-four thousand, four hundred thirty-four".