243121245343 has 16 divisors (see below), whose sum is σ = 246384737280. Its totient is φ = 239875956000.

The previous prime is 243121245331. The next prime is 243121245347. The reversal of 243121245343 is 343542121342.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243121245343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243121245299 and 243121245308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243121245347) 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, 43050346 + ... + 43055992.

It is an arithmetic number, because the mean of its divisors is an integer number (15399046080).

Almost surely, 2^243121245343 is an apocalyptic number.

243121245343 is a deficient number, since it is larger than the sum of its proper divisors (3263491937).

243121245343 is a wasteful number, since it uses less digits than its factorization.

243121245343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7158.

The product of its digits is 69120, while the sum is 34.

Adding to 243121245343 its reverse (343542121342), we get a palindrome (586663366685).

The spelling of 243121245343 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred forty-five thousand, three hundred forty-three".