243121244011 has 4 divisors (see below), whose sum is σ = 243135091800. Its totient is φ = 243107396224.

The previous prime is 243121243997. The next prime is 243121244071. The reversal of 243121244011 is 110442121342.

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 243121244011 - 2¹⁵ = 243121211243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243121244071) 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, 6897526 + ... + 6932683.

It is an arithmetic number, because the mean of its divisors is an integer number (60783772950).

Almost surely, 2^243121244011 is an apocalyptic number.

243121244011 is a deficient number, since it is larger than the sum of its proper divisors (13847789).

243121244011 is a wasteful number, since it uses less digits than its factorization.

243121244011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13847788.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 243121244011 its reverse (110442121342), we get a palindrome (353563365353).

The spelling of 243121244011 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred forty-four thousand, eleven".