12321134424 has 64 divisors (see below), whose sum is σ = 34324214400. Its totient is φ = 4095184032.

The previous prime is 12321134417. The next prime is 12321134447. The reversal of 12321134424 is 42443112321.

12321134424 is a `hidden beast` number, since 1 + 2 + 3 + 211 + 3 + 442 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 7242 + ... + 157145.

It is an arithmetic number, because the mean of its divisors is an integer number (536315850).

Almost surely, 2^12321134424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12321134424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17162107200).

12321134424 is an abundant number, since it is smaller than the sum of its proper divisors (22003079976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12321134424 is a wasteful number, since it uses less digits than its factorization.

12321134424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164749 (or 164739 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

Adding to 12321134424 its reverse (42443112321), we get a palindrome (54764246745).

The spelling of 12321134424 in words is "twelve billion, three hundred twenty-one million, one hundred thirty-four thousand, four hundred twenty-four".