231312313123 has 4 divisors (see below), whose sum is σ = 231313275088. Its totient is φ = 231311351160.

The previous prime is 231312313087. The next prime is 231312313129. The reversal of 231312313123 is 321313213132.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 231312313123 - 2²¹ = 231310215971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231312313129) 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, 232090 + ... + 718672.

It is an arithmetic number, because the mean of its divisors is an integer number (57828318772).

Almost surely, 2^231312313123 is an apocalyptic number.

231312313123 is a deficient number, since it is larger than the sum of its proper divisors (961965).

231312313123 is an equidigital number, since it uses as much as digits as its factorization.

231312313123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961964.

The product of its digits is 1944, while the sum is 25.

Adding to 231312313123 its reverse (321313213132), we get a palindrome (552625526255).

Subtracting 231312313123 from its reverse (321313213132), we obtain a palindrome (90000900009).

The spelling of 231312313123 in words is "two hundred thirty-one billion, three hundred twelve million, three hundred thirteen thousand, one hundred twenty-three".