231012032123 has 4 divisors (see below), whose sum is σ = 231068504568. Its totient is φ = 230955559680.

The previous prime is 231012032101. The next prime is 231012032129. The reversal of 231012032123 is 321230210132.

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-231012032123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231012032095 and 231012032104.

It is not an unprimeable number, because it can be changed into a prime (231012032129) 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, 28230086 + ... + 28238267.

It is an arithmetic number, because the mean of its divisors is an integer number (57767126142).

Almost surely, 2^231012032123 is an apocalyptic number.

231012032123 is a deficient number, since it is larger than the sum of its proper divisors (56472445).

231012032123 is an equidigital number, since it uses as much as digits as its factorization.

231012032123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56472444.

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

Adding to 231012032123 its reverse (321230210132), we get a palindrome (552242242255).

The spelling of 231012032123 in words is "two hundred thirty-one billion, twelve million, thirty-two thousand, one hundred twenty-three".