12000135023 has 4 divisors (see below), whose sum is σ = 12521880048. Its totient is φ = 11478390000.

The previous prime is 12000135019. The next prime is 12000135029. The reversal of 12000135023 is 32053100021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12000135023 - 2² = 12000135019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12000134992 and 12000135010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12000135029) 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 3 ways as a sum of consecutive naturals, for example, 260872478 + ... + 260872523.

It is an arithmetic number, because the mean of its divisors is an integer number (3130470012).

Almost surely, 2^12000135023 is an apocalyptic number.

12000135023 is a deficient number, since it is larger than the sum of its proper divisors (521745025).

12000135023 is an equidigital number, since it uses as much as digits as its factorization.

12000135023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521745024.

The product of its (nonzero) digits is 180, while the sum is 17.

Adding to 12000135023 its reverse (32053100021), we get a palindrome (44053235044).

The spelling of 12000135023 in words is "twelve billion, one hundred thirty-five thousand, twenty-three".