123012111103 has 24 divisors (see below), whose sum is σ = 150653644800. Its totient is φ = 99871915248.

The previous prime is 123012111091. The next prime is 123012111107. The reversal of 123012111103 is 301111210321.

It is a happy number.

It is not a de Polignac number, because 123012111103 - 2⁹ = 123012110591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123012111107) 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 23 ways as a sum of consecutive naturals, for example, 9060226 + ... + 9073792.

It is an arithmetic number, because the mean of its divisors is an integer number (6277235200).

Almost surely, 2^123012111103 is an apocalyptic number.

123012111103 is a deficient number, since it is larger than the sum of its proper divisors (27641533697).

123012111103 is a wasteful number, since it uses less digits than its factorization.

123012111103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23339 (or 23332 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 123012111103 its reverse (301111210321), we get a palindrome (424123321424).

The spelling of 123012111103 in words is "one hundred twenty-three billion, twelve million, one hundred eleven thousand, one hundred three".