12123131011223 has 16 divisors (see below), whose sum is σ = 12748634660160. Its totient is φ = 11511514694400.

The previous prime is 12123131011177. The next prime is 12123131011231. The reversal of 12123131011223 is 32211013132121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12123131011223 - 2¹⁶ = 12123130945687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123131011273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11630318 + ... + 12629748.

It is an arithmetic number, because the mean of its divisors is an integer number (796789666260).

Almost surely, 2^{12123131011223} is an apocalyptic number.

12123131011223 is a deficient number, since it is larger than the sum of its proper divisors (625503648937).

12123131011223 is an equidigital number, since it uses as much as digits as its factorization.

12123131011223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006378.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 12123131011223 its reverse (32211013132121), we get a palindrome (44334144143344).

The spelling of 12123131011223 in words is "twelve trillion, one hundred twenty-three billion, one hundred thirty-one million, eleven thousand, two hundred twenty-three".