123223544123 has 4 divisors (see below), whose sum is σ = 123224512680. Its totient is φ = 123222575568.

The previous prime is 123223544089. The next prime is 123223544137. The reversal of 123223544123 is 321445322321.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123223544123 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 123223544123.

It is not an unprimeable number, because it can be changed into a prime (123223544153) 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, 258290 + ... + 559607.

It is an arithmetic number, because the mean of its divisors is an integer number (30806128170).

Almost surely, 2^123223544123 is an apocalyptic number.

123223544123 is a deficient number, since it is larger than the sum of its proper divisors (968557).

123223544123 is an equidigital number, since it uses as much as digits as its factorization.

123223544123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968556.

The product of its digits is 34560, while the sum is 32.

Adding to 123223544123 its reverse (321445322321), we get a palindrome (444668866444).

The spelling of 123223544123 in words is "one hundred twenty-three billion, two hundred twenty-three million, five hundred forty-four thousand, one hundred twenty-three".