243420411321 has 12 divisors (see below), whose sum is σ = 351825807060. Its totient is φ = 162179406720.

The previous prime is 243420411319. The next prime is 243420411371. The reversal of 243420411321 is 123114024342.

243420411321 is a `hidden beast` number, since 2 + 434 + 204 + 1 + 1 + 3 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 232382807721 + 11037603600 = 482061^2 + 105060^2 .

It is not a de Polignac number, because 243420411321 - 2¹ = 243420411319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243420411371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8390340 + ... + 8419301.

It is an arithmetic number, because the mean of its divisors is an integer number (29318817255).

Almost surely, 2^243420411321 is an apocalyptic number.

It is an amenable number.

243420411321 is a deficient number, since it is larger than the sum of its proper divisors (108405395739).

243420411321 is a wasteful number, since it uses less digits than its factorization.

243420411321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16811256 (or 16811253 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 243420411321 its reverse (123114024342), we get a palindrome (366534435663).

The spelling of 243420411321 in words is "two hundred forty-three billion, four hundred twenty million, four hundred eleven thousand, three hundred twenty-one".