243121234241 has 16 divisors (see below), whose sum is σ = 263818114560. Its totient is φ = 223139934720.

The previous prime is 243121234219. The next prime is 243121234261. The reversal of 243121234241 is 142432121342.

It is a cyclic number.

It is not a de Polignac number, because 243121234241 - 2¹⁸ = 243120972097 is a prime.

It is a super-3 number, since 3×243121234241³ (a number of 35 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (243121234261) 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 15 ways as a sum of consecutive naturals, for example, 1517780 + ... + 1670298.

It is an arithmetic number, because the mean of its divisors is an integer number (16488632160).

Almost surely, 2^243121234241 is an apocalyptic number.

It is an amenable number.

243121234241 is a deficient number, since it is larger than the sum of its proper divisors (20696880319).

243121234241 is a wasteful number, since it uses less digits than its factorization.

243121234241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154864.

The product of its digits is 9216, while the sum is 29.

Adding to 243121234241 its reverse (142432121342), we get a palindrome (385553355583).

The spelling of 243121234241 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred thirty-four thousand, two hundred forty-one".