243440311121 has 4 divisors (see below), whose sum is σ = 278217498432. Its totient is φ = 208663123812.

The previous prime is 243440311111. The next prime is 243440311139. The reversal of 243440311121 is 121113044342.

243440311121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 243440311121 - 2⁶ = 243440311057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243440311111) 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 in 3 ways as a sum of consecutive naturals, for example, 17388593645 + ... + 17388593658.

It is an arithmetic number, because the mean of its divisors is an integer number (69554374608).

Almost surely, 2^243440311121 is an apocalyptic number.

It is an amenable number.

243440311121 is a deficient number, since it is larger than the sum of its proper divisors (34777187311).

243440311121 is an equidigital number, since it uses as much as digits as its factorization.

243440311121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34777187310.

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

Adding to 243440311121 its reverse (121113044342), we get a palindrome (364553355463).

The spelling of 243440311121 in words is "two hundred forty-three billion, four hundred forty million, three hundred eleven thousand, one hundred twenty-one".