243043132115123 has 2 divisors, whose sum is σ = 243043132115124. Its totient is φ = 243043132115122.

The previous prime is 243043132115071. The next prime is 243043132115167. The reversal of 243043132115123 is 321511231340342.

It is a happy number.

243043132115123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243043132115123 - 2³⁴ = 243025952245939 is a prime.

It is not a weakly prime, because it can be changed into another prime (243043132115023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121521566057561 + 121521566057562.

It is an arithmetic number, because the mean of its divisors is an integer number (121521566057562).

Almost surely, 2^{243043132115123} is an apocalyptic number.

243043132115123 is a deficient number, since it is larger than the sum of its proper divisors (1).

243043132115123 is an equidigital number, since it uses as much as digits as its factorization.

243043132115123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 35.

Adding to 243043132115123 its reverse (321511231340342), we get a palindrome (564554363455465).

The spelling of 243043132115123 in words is "two hundred forty-three trillion, forty-three billion, one hundred thirty-two million, one hundred fifteen thousand, one hundred twenty-three".