12001231011223 has 4 divisors (see below), whose sum is σ = 12388367495488. Its totient is φ = 11614094526960.

The previous prime is 12001231011199. The next prime is 12001231011283. The reversal of 12001231011223 is 32211013210021.

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 12001231011223 - 2²⁵ = 12001197456791 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12001231011223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001231011283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193568242086 + ... + 193568242147.

It is an arithmetic number, because the mean of its divisors is an integer number (3097091873872).

Almost surely, 2^{12001231011223} is an apocalyptic number.

12001231011223 is a deficient number, since it is larger than the sum of its proper divisors (387136484265).

12001231011223 is an equidigital number, since it uses as much as digits as its factorization.

12001231011223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387136484264.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 12001231011223 its reverse (32211013210021), we get a palindrome (44212244221244).

The spelling of 12001231011223 in words is "twelve trillion, one billion, two hundred thirty-one million, eleven thousand, two hundred twenty-three".