243120343121 has 8 divisors (see below), whose sum is σ = 245330979144. Its totient is φ = 240919511040.

The previous prime is 243120343091. The next prime is 243120343129. The reversal of 243120343121 is 121343021342.

It can be written as a sum of positive squares in 4 ways, for example, as 29985770896 + 213134572225 = 173164^2 + 461665^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243120343121 - 2³⁰ = 242046601297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243120343129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2401160 + ... + 2500361.

It is an arithmetic number, because the mean of its divisors is an integer number (30666372393).

Almost surely, 2^243120343121 is an apocalyptic number.

It is an amenable number.

243120343121 is a deficient number, since it is larger than the sum of its proper divisors (2210636023).

243120343121 is a wasteful number, since it uses less digits than its factorization.

243120343121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4901971.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 243120343121 its reverse (121343021342), we get a palindrome (364463364463).

The spelling of 243120343121 in words is "two hundred forty-three billion, one hundred twenty million, three hundred forty-three thousand, one hundred twenty-one".