123111232103 has 4 divisors (see below), whose sum is σ = 123113584608. Its totient is φ = 123108879600.

The previous prime is 123111232081. The next prime is 123111232117. The reversal of 123111232103 is 301232111321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 301232111321 = 173 ⋅1741226077.

It is a cyclic number.

It is not a de Polignac number, because 123111232103 - 2⁸ = 123111231847 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 (123111232183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1095926 + ... + 1203027.

It is an arithmetic number, because the mean of its divisors is an integer number (30778396152).

Almost surely, 2^123111232103 is an apocalyptic number.

123111232103 is a deficient number, since it is larger than the sum of its proper divisors (2352505).

123111232103 is an equidigital number, since it uses as much as digits as its factorization.

123111232103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2352504.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 123111232103 its reverse (301232111321), we get a palindrome (424343343424).

The spelling of 123111232103 in words is "one hundred twenty-three billion, one hundred eleven million, two hundred thirty-two thousand, one hundred three".