243121244143 has 2 divisors, whose sum is σ = 243121244144. Its totient is φ = 243121244142.

The previous prime is 243121244141. The next prime is 243121244147. The reversal of 243121244143 is 341442121342.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243121244143 - 2¹ = 243121244141 is a prime.

Together with 243121244141, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243121244141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121560622071 + 121560622072.

It is an arithmetic number, because the mean of its divisors is an integer number (121560622072).

Almost surely, 2^243121244143 is an apocalyptic number.

243121244143 is a deficient number, since it is larger than the sum of its proper divisors (1).

243121244143 is an equidigital number, since it uses as much as digits as its factorization.

243121244143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18432, while the sum is 31.

Adding to 243121244143 its reverse (341442121342), we get a palindrome (584563365485).

The spelling of 243121244143 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred forty-four thousand, one hundred forty-three".