231203012123 has 2 divisors, whose sum is σ = 231203012124. Its totient is φ = 231203012122.

The previous prime is 231203012119. The next prime is 231203012141. The reversal of 231203012123 is 321210302132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231203012123 - 2² = 231203012119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231203012095 and 231203012104.

It is not a weakly prime, because it can be changed into another prime (231203012113) 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 as a sum of consecutive naturals, namely, 115601506061 + 115601506062.

It is an arithmetic number, because the mean of its divisors is an integer number (115601506062).

Almost surely, 2^231203012123 is an apocalyptic number.

231203012123 is a deficient number, since it is larger than the sum of its proper divisors (1).

231203012123 is an equidigital number, since it uses as much as digits as its factorization.

231203012123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 231203012123 its reverse (321210302132), we get a palindrome (552413314255).

The spelling of 231203012123 in words is "two hundred thirty-one billion, two hundred three million, twelve thousand, one hundred twenty-three".