243121103441 has 4 divisors (see below), whose sum is σ = 243727390884. Its totient is φ = 242514816000.

The previous prime is 243121103437. The next prime is 243121103447. The reversal of 243121103441 is 144301121342.

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

It can be written as a sum of positive squares in 2 ways, for example, as 234822622225 + 8298481216 = 484585^2 + 91096^2 .

It is a cyclic number.

It is not a de Polignac number, because 243121103441 - 2² = 243121103437 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243121103441.

It is not an unprimeable number, because it can be changed into a prime (243121103447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303143120 + ... + 303143921.

It is an arithmetic number, because the mean of its divisors is an integer number (60931847721).

Almost surely, 2^243121103441 is an apocalyptic number.

It is an amenable number.

243121103441 is a deficient number, since it is larger than the sum of its proper divisors (606287443).

243121103441 is an equidigital number, since it uses as much as digits as its factorization.

243121103441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606287442.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 243121103441 its reverse (144301121342), we get a palindrome (387422224783).

The spelling of 243121103441 in words is "two hundred forty-three billion, one hundred twenty-one million, one hundred three thousand, four hundred forty-one".