243121241143 has 32 divisors (see below), whose sum is σ = 299768532480. Its totient is φ = 194294016000.

The previous prime is 243121241141. The next prime is 243121241149. The reversal of 243121241143 is 341142121342.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 243121241143 - 2¹ = 243121241141 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 (243121241141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 229618 + ... + 734143.

It is an arithmetic number, because the mean of its divisors is an integer number (9367766640).

Almost surely, 2^243121241143 is an apocalyptic number.

243121241143 is a deficient number, since it is larger than the sum of its proper divisors (56647291337).

243121241143 is a wasteful number, since it uses less digits than its factorization.

243121241143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963879.

The product of its digits is 4608, while the sum is 28.

Adding to 243121241143 its reverse (341142121342), we get a palindrome (584263362485).

The spelling of 243121241143 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred forty-one thousand, one hundred forty-three".