243330343134021 has 24 divisors (see below), whose sum is σ = 412924218653856. Its totient is φ = 136128863291040.

The previous prime is 243330343133939. The next prime is 243330343134037. The reversal of 243330343134021 is 120431343033342.

243330343134021 is a `hidden beast` number, since 2 + 4 + 3 + 3 + 303 + 4 + 3 + 1 + 340 + 2 + 1 = 666.

243330343134021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 243330343134021 - 2¹⁰ = 243330343132997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243330343134061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 94533931555 + ... + 94533934128.

It is an arithmetic number, because the mean of its divisors is an integer number (17205175777244).

Almost surely, 2^{243330343134021} is an apocalyptic number.

It is an amenable number.

243330343134021 is a deficient number, since it is larger than the sum of its proper divisors (169593875519835).

243330343134021 is a wasteful number, since it uses less digits than its factorization.

243330343134021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189067865713 (or 189067865710 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 36.

Adding to 243330343134021 its reverse (120431343033342), we get a palindrome (363761686167363).

The spelling of 243330343134021 in words is "two hundred forty-three trillion, three hundred thirty billion, three hundred forty-three million, one hundred thirty-four thousand, twenty-one".