12120103123 has 4 divisors (see below), whose sum is σ = 12348784368. Its totient is φ = 11891421880.

The previous prime is 12120103049. The next prime is 12120103217. The reversal of 12120103123 is 32130102121.

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

It is a cyclic number.

It is not a de Polignac number, because 12120103123 - 2⁹ = 12120102611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12120103097 and 12120103106.

It is not an unprimeable number, because it can be changed into a prime (12120103423) 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, 114340543 + ... + 114340648.

It is an arithmetic number, because the mean of its divisors is an integer number (3087196092).

Almost surely, 2^12120103123 is an apocalyptic number.

12120103123 is a deficient number, since it is larger than the sum of its proper divisors (228681245).

12120103123 is an equidigital number, since it uses as much as digits as its factorization.

12120103123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228681244.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12120103123 its reverse (32130102121), we get a palindrome (44250205244).

The spelling of 12120103123 in words is "twelve billion, one hundred twenty million, one hundred three thousand, one hundred twenty-three".