243121101043 has 4 divisors (see below), whose sum is σ = 244464311728. Its totient is φ = 241777890360.

The previous prime is 243121100987. The next prime is 243121101089. The reversal of 243121101043 is 340101121342.

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 243121101043 - 2²⁹ = 242584230131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243121101943) 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, 671605071 + ... + 671605432.

It is an arithmetic number, because the mean of its divisors is an integer number (61116077932).

Almost surely, 2^243121101043 is an apocalyptic number.

243121101043 is a deficient number, since it is larger than the sum of its proper divisors (1343210685).

243121101043 is a wasteful number, since it uses less digits than its factorization.

243121101043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343210684.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 243121101043 its reverse (340101121342), we get a palindrome (583222222385).

The spelling of 243121101043 in words is "two hundred forty-three billion, one hundred twenty-one million, one hundred one thousand, forty-three".