243421240001 has 4 divisors (see below), whose sum is σ = 246502521600. Its totient is φ = 240339958404.

The previous prime is 243421239989. The next prime is 243421240031. The reversal of 243421240001 is 100042124342.

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 243421240001 - 2⁶ = 243421239937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243421240031) 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, 1540640681 + ... + 1540640838.

It is an arithmetic number, because the mean of its divisors is an integer number (61625630400).

Almost surely, 2^243421240001 is an apocalyptic number.

It is an amenable number.

243421240001 is a deficient number, since it is larger than the sum of its proper divisors (3081281599).

243421240001 is an equidigital number, since it uses as much as digits as its factorization.

243421240001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3081281598.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 243421240001 its reverse (100042124342), we get a palindrome (343463364343).

The spelling of 243421240001 in words is "two hundred forty-three billion, four hundred twenty-one million, two hundred forty thousand, one".