12001134423 has 16 divisors (see below), whose sum is σ = 16376290560. Its totient is φ = 7815534144.

The previous prime is 12001134421. The next prime is 12001134433. The reversal of 12001134423 is 32443110021.

It is not a de Polignac number, because 12001134423 - 2¹ = 12001134421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12001134423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001134421) by changing a digit.

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, 248611 + ... + 292932.

It is an arithmetic number, because the mean of its divisors is an integer number (1023518160).

Almost surely, 2^12001134423 is an apocalyptic number.

12001134423 is a deficient number, since it is larger than the sum of its proper divisors (4375156137).

12001134423 is an equidigital number, since it uses as much as digits as its factorization.

12001134423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541718.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 12001134423 its reverse (32443110021), we get a palindrome (44444244444).

The spelling of 12001134423 in words is "twelve billion, one million, one hundred thirty-four thousand, four hundred twenty-three".