243012224021 has 4 divisors (see below), whose sum is σ = 277728256032. Its totient is φ = 208296192012.

The previous prime is 243012223999. The next prime is 243012224047. The reversal of 243012224021 is 120422210342.

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 243012224021 - 2¹⁴ = 243012207637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243012224071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17358015995 + ... + 17358016008.

It is an arithmetic number, because the mean of its divisors is an integer number (69432064008).

Almost surely, 2^243012224021 is an apocalyptic number.

It is an amenable number.

243012224021 is a deficient number, since it is larger than the sum of its proper divisors (34716032011).

243012224021 is an equidigital number, since it uses as much as digits as its factorization.

243012224021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34716032010.

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

Adding to 243012224021 its reverse (120422210342), we get a palindrome (363434434363).

The spelling of 243012224021 in words is "two hundred forty-three billion, twelve million, two hundred twenty-four thousand, twenty-one".