123120103 has 4 divisors (see below), whose sum is σ = 130362480. Its totient is φ = 115877728.

The previous prime is 123120091. The next prime is 123120131. The reversal of 123120103 is 301021321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123120103 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 (123120163) 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, 3621163 + ... + 3621196.

It is an arithmetic number, because the mean of its divisors is an integer number (32590620).

Almost surely, 2^123120103 is an apocalyptic number.

123120103 is a deficient number, since it is larger than the sum of its proper divisors (7242377).

123120103 is an equidigital number, since it uses as much as digits as its factorization.

123120103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7242376.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 123120103 is about 11095.9498466783. The cubic root of 123120103 is about 497.4807992388.

Adding to 123120103 its reverse (301021321), we get a palindrome (424141424).

The spelling of 123120103 in words is "one hundred twenty-three million, one hundred twenty thousand, one hundred three".