243121245233 has 2 divisors, whose sum is σ = 243121245234. Its totient is φ = 243121245232.

The previous prime is 243121245181. The next prime is 243121245239. The reversal of 243121245233 is 332542121342.

243121245233 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 can be written as a sum of positive squares in only one way, i.e., 193022271649 + 50098973584 = 439343^2 + 223828^2 .

It is a cyclic number.

It is not a de Polignac number, because 243121245233 - 2¹⁰ = 243121244209 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 243121245233.

It is not a weakly prime, because it can be changed into another prime (243121245239) 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, 121560622616 + 121560622617.

It is an arithmetic number, because the mean of its divisors is an integer number (121560622617).

Almost surely, 2^243121245233 is an apocalyptic number.

It is an amenable number.

243121245233 is a deficient number, since it is larger than the sum of its proper divisors (1).

243121245233 is an equidigital number, since it uses as much as digits as its factorization.

243121245233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 32.

Adding to 243121245233 its reverse (332542121342), we get a palindrome (575663366575).

The spelling of 243121245233 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred forty-five thousand, two hundred thirty-three".