231103123 has 2 divisors, whose sum is σ = 231103124. Its totient is φ = 231103122.

The previous prime is 231103121. The next prime is 231103139. The reversal of 231103123 is 321301132.

It is an a-pointer prime, because the next prime (231103139) can be obtained adding 231103123 to its sum of digits (16).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231103123 - 2¹ = 231103121 is a prime.

Together with 231103121, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 231103097 and 231103106.

It is not a weakly prime, because it can be changed into another prime (231103121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115551561 + 115551562.

It is an arithmetic number, because the mean of its divisors is an integer number (115551562).

Almost surely, 2^231103123 is an apocalyptic number.

231103123 is a deficient number, since it is larger than the sum of its proper divisors (1).

231103123 is an equidigital number, since it uses as much as digits as its factorization.

231103123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 231103123 is about 15202.0762726675. The cubic root of 231103123 is about 613.6705350471.

Adding to 231103123 its reverse (321301132), we get a palindrome (552404255).

The spelling of 231103123 in words is "two hundred thirty-one million, one hundred three thousand, one hundred twenty-three".