243141121 has 4 divisors (see below), whose sum is σ = 243573552. Its totient is φ = 242708692.

The previous prime is 243141071. The next prime is 243141127. The reversal of 243141121 is 121141342.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 243141121 - 2⁹ = 243140609 is a prime.

It is a super-2 number, since 2×243141121² = 118235209442273282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243141127) 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, 215371 + ... + 216496.

It is an arithmetic number, because the mean of its divisors is an integer number (60893388).

Almost surely, 2^243141121 is an apocalyptic number.

It is an amenable number.

243141121 is a deficient number, since it is larger than the sum of its proper divisors (432431).

243141121 is an equidigital number, since it uses as much as digits as its factorization.

243141121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432430.

The product of its digits is 192, while the sum is 19.

The square root of 243141121 is about 15592.9830693168. The cubic root of 243141121 is about 624.1459233365.

Adding to 243141121 its reverse (121141342), we get a palindrome (364282463).

The spelling of 243141121 in words is "two hundred forty-three million, one hundred forty-one thousand, one hundred twenty-one".