243213122241 has 6 divisors (see below), whose sum is σ = 351307843250. Its totient is φ = 162142081488.

The previous prime is 243213122237. The next prime is 243213122263. The reversal of 243213122241 is 142221312342.

243213122241 is a `hidden beast` number, since 2 + 4 + 321 + 312 + 2 + 24 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 156918184641 + 86294937600 = 396129^2 + 293760^2 .

It is not a de Polignac number, because 243213122241 - 2² = 243213122237 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243213122441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13511840116 + ... + 13511840133.

Almost surely, 2^243213122241 is an apocalyptic number.

It is an amenable number.

243213122241 is a deficient number, since it is larger than the sum of its proper divisors (108094721009).

243213122241 is a wasteful number, since it uses less digits than its factorization.

243213122241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27023680255 (or 27023680252 counting only the distinct ones).

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

Adding to 243213122241 its reverse (142221312342), we get a palindrome (385434434583).

The spelling of 243213122241 in words is "two hundred forty-three billion, two hundred thirteen million, one hundred twenty-two thousand, two hundred forty-one".