243121004411 has 4 divisors (see below), whose sum is σ = 243124411992. Its totient is φ = 243117596832.

The previous prime is 243121004393. The next prime is 243121004417. The reversal of 243121004411 is 114400121342.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243121004411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243121004417) 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, 1594430 + ... + 1740243.

It is an arithmetic number, because the mean of its divisors is an integer number (60781102998).

Almost surely, 2^243121004411 is an apocalyptic number.

243121004411 is a deficient number, since it is larger than the sum of its proper divisors (3407581).

243121004411 is an equidigital number, since it uses as much as digits as its factorization.

243121004411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3407580.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 243121004411 its reverse (114400121342), we get a palindrome (357521125753).

The spelling of 243121004411 in words is "two hundred forty-three billion, one hundred twenty-one million, four thousand, four hundred eleven".