243121131143 has 4 divisors (see below), whose sum is σ = 265223052168. Its totient is φ = 221019210120.

The previous prime is 243121131101. The next prime is 243121131181. The reversal of 243121131143 is 341131121342.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 243121131143 - 2²⁴ = 243104353927 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 (243121631143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11050960496 + ... + 11050960517.

It is an arithmetic number, because the mean of its divisors is an integer number (66305763042).

Almost surely, 2^243121131143 is an apocalyptic number.

243121131143 is a deficient number, since it is larger than the sum of its proper divisors (22101921025).

243121131143 is a wasteful number, since it uses less digits than its factorization.

243121131143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22101921024.

The product of its digits is 1728, while the sum is 26.

Adding to 243121131143 its reverse (341131121342), we get a palindrome (584252252485).

The spelling of 243121131143 in words is "two hundred forty-three billion, one hundred twenty-one million, one hundred thirty-one thousand, one hundred forty-three".