243243123311 has 2 divisors, whose sum is σ = 243243123312. Its totient is φ = 243243123310.

The previous prime is 243243123271. The next prime is 243243123443. The reversal of 243243123311 is 113321342342.

243243123311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243243123311 - 2¹⁴ = 243243106927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243243123911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121621561655 + 121621561656.

It is an arithmetic number, because the mean of its divisors is an integer number (121621561656).

Almost surely, 2^243243123311 is an apocalyptic number.

243243123311 is a deficient number, since it is larger than the sum of its proper divisors (1).

243243123311 is an equidigital number, since it uses as much as digits as its factorization.

243243123311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 29.

Adding to 243243123311 its reverse (113321342342), we get a palindrome (356564465653).

The spelling of 243243123311 in words is "two hundred forty-three billion, two hundred forty-three million, one hundred twenty-three thousand, three hundred eleven".