243121430133 has 6 divisors (see below), whose sum is σ = 351175399094. Its totient is φ = 162080953416.

The previous prime is 243121430059. The next prime is 243121430177. The reversal of 243121430133 is 331034121342.

It is a happy number.

243121430133 is a `hidden beast` number, since 2 + 4 + 312 + 14 + 301 + 33 = 666.

It can be written as a sum of positive squares in only one way, i.e., 235179412209 + 7942017924 = 484953^2 + 89118^2 .

It is not a de Polignac number, because 243121430133 - 2¹⁴ = 243121413749 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243121430097 and 243121430106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243121430633) 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, 13506746110 + ... + 13506746127.

Almost surely, 2^243121430133 is an apocalyptic number.

It is an amenable number.

243121430133 is a deficient number, since it is larger than the sum of its proper divisors (108053968961).

243121430133 is a wasteful number, since it uses less digits than its factorization.

243121430133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27013492243 (or 27013492240 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 243121430133 its reverse (331034121342), we get a palindrome (574155551475).

The spelling of 243121430133 in words is "two hundred forty-three billion, one hundred twenty-one million, four hundred thirty thousand, one hundred thirty-three".