12231211123 has 4 divisors (see below), whose sum is σ = 12327520000. Its totient is φ = 12134902248.

The previous prime is 12231211121. The next prime is 12231211133. The reversal of 12231211123 is 32111213221.

12231211123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12231211123 - 2¹ = 12231211121 is a prime.

It is a super-2 number, since 2×12231211123² (a number of 21 digits) contains 22 as substring.

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 12231211123.

It is not an unprimeable number, because it can be changed into a prime (12231211121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48154248 + ... + 48154501.

It is an arithmetic number, because the mean of its divisors is an integer number (3081880000).

Almost surely, 2^12231211123 is an apocalyptic number.

12231211123 is a deficient number, since it is larger than the sum of its proper divisors (96308877).

12231211123 is an equidigital number, since it uses as much as digits as its factorization.

12231211123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96308876.

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

Adding to 12231211123 its reverse (32111213221), we get a palindrome (44342424344).

The spelling of 12231211123 in words is "twelve billion, two hundred thirty-one million, two hundred eleven thousand, one hundred twenty-three".