201323230123 has 4 divisors (see below), whose sum is σ = 201328894008. Its totient is φ = 201317566240.

The previous prime is 201323230111. The next prime is 201323230193. The reversal of 201323230123 is 321032323102.

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-201323230123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201323230094 and 201323230103.

It is not an unprimeable number, because it can be changed into a prime (201323230193) 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, 2778286 + ... + 2849827.

It is an arithmetic number, because the mean of its divisors is an integer number (50332223502).

Almost surely, 2^201323230123 is an apocalyptic number.

201323230123 is a deficient number, since it is larger than the sum of its proper divisors (5663885).

201323230123 is an equidigital number, since it uses as much as digits as its factorization.

201323230123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5663884.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 201323230123 its reverse (321032323102), we get a palindrome (522355553225).

The spelling of 201323230123 in words is "two hundred one billion, three hundred twenty-three million, two hundred thirty thousand, one hundred twenty-three".