243113121241 has 2 divisors, whose sum is σ = 243113121242. Its totient is φ = 243113121240.

The previous prime is 243113121197. The next prime is 243113121257. The reversal of 243113121241 is 142121311342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 224240131600 + 18872989641 = 473540^2 + 137379^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243113121241 is a prime.

It is not a weakly prime, because it can be changed into another prime (243113101241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121556560620 + 121556560621.

It is an arithmetic number, because the mean of its divisors is an integer number (121556560621).

Almost surely, 2^243113121241 is an apocalyptic number.

It is an amenable number.

243113121241 is a deficient number, since it is larger than the sum of its proper divisors (1).

243113121241 is an equidigital number, since it uses as much as digits as its factorization.

243113121241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 25.

Adding to 243113121241 its reverse (142121311342), we get a palindrome (385234432583).

The spelling of 243113121241 in words is "two hundred forty-three billion, one hundred thirteen million, one hundred twenty-one thousand, two hundred forty-one".