243120230123 has 4 divisors (see below), whose sum is σ = 247105807728. Its totient is φ = 239134652520.

The previous prime is 243120230057. The next prime is 243120230141. The reversal of 243120230123 is 321032021342.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 243120230123 - 2¹⁶ = 243120164587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243120230183) 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, 1992788711 + ... + 1992788832.

It is an arithmetic number, because the mean of its divisors is an integer number (61776451932).

Almost surely, 2^243120230123 is an apocalyptic number.

243120230123 is a deficient number, since it is larger than the sum of its proper divisors (3985577605).

243120230123 is an equidigital number, since it uses as much as digits as its factorization.

243120230123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3985577604.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 243120230123 its reverse (321032021342), we get a palindrome (564152251465).

The spelling of 243120230123 in words is "two hundred forty-three billion, one hundred twenty million, two hundred thirty thousand, one hundred twenty-three".