123112312223 has 16 divisors (see below), whose sum is σ = 132240522240. Its totient is φ = 114202023936.

The previous prime is 123112312207. The next prime is 123112312237. The reversal of 123112312223 is 322213211321.

It is a cyclic number.

It is not a de Polignac number, because 123112312223 - 2⁴ = 123112312207 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 (123112312283) 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, 343586 + ... + 603552.

It is an arithmetic number, because the mean of its divisors is an integer number (8265032640).

Almost surely, 2^123112312223 is an apocalyptic number.

123112312223 is a deficient number, since it is larger than the sum of its proper divisors (9128210017).

123112312223 is a wasteful number, since it uses less digits than its factorization.

123112312223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260386.

The product of its digits is 864, while the sum is 23.

Adding to 123112312223 its reverse (322213211321), we get a palindrome (445325523544).

The spelling of 123112312223 in words is "one hundred twenty-three billion, one hundred twelve million, three hundred twelve thousand, two hundred twenty-three".