243121224313 has 16 divisors (see below), whose sum is σ = 281396566080. Its totient is φ = 207594419200.

The previous prime is 243121224293. The next prime is 243121224383. The reversal of 243121224313 is 313422121342.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243121224313 is a prime.

It is a super-2 number, since 2×243121224313² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243121224383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1232128 + ... + 1415761.

It is an arithmetic number, because the mean of its divisors is an integer number (17587285380).

Almost surely, 2^243121224313 is an apocalyptic number.

It is an amenable number.

243121224313 is a deficient number, since it is larger than the sum of its proper divisors (38275341767).

243121224313 is a wasteful number, since it uses less digits than its factorization.

243121224313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2648408.

The product of its digits is 6912, while the sum is 28.

Adding to 243121224313 its reverse (313422121342), we get a palindrome (556543345655).

The spelling of 243121224313 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred twenty-four thousand, three hundred thirteen".