243143121123 has 24 divisors (see below), whose sum is σ = 401473938528. Its totient is φ = 138906104832.

The previous prime is 243143121103. The next prime is 243143121157. The reversal of 243143121123 is 321121341342.

243143121123 is a `hidden beast` number, since 2 + 4 + 314 + 312 + 11 + 23 = 666.

It is not a de Polignac number, because 243143121123 - 2²² = 243138926819 is a prime.

It is a super-2 number, since 2×243143121123² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (243143121103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 185790 + ... + 721667.

It is an arithmetic number, because the mean of its divisors is an integer number (16728080772).

Almost surely, 2^243143121123 is an apocalyptic number.

243143121123 is a deficient number, since it is larger than the sum of its proper divisors (158330817405).

243143121123 is a wasteful number, since it uses less digits than its factorization.

243143121123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911723 (or 911720 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

Adding to 243143121123 its reverse (321121341342), we get a palindrome (564264462465).

The spelling of 243143121123 in words is "two hundred forty-three billion, one hundred forty-three million, one hundred twenty-one thousand, one hundred twenty-three".