123243124231 has 4 divisors (see below), whose sum is σ = 130492719792. Its totient is φ = 115993528672.

The previous prime is 123243124223. The next prime is 123243124241. The reversal of 123243124231 is 132421342321.

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 123243124231 - 2³ = 123243124223 is a prime.

It is a super-2 number, since 2×123243124231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123243124231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123243124201) 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, 3624797755 + ... + 3624797788.

It is an arithmetic number, because the mean of its divisors is an integer number (32623179948).

Almost surely, 2^123243124231 is an apocalyptic number.

123243124231 is a deficient number, since it is larger than the sum of its proper divisors (7249595561).

123243124231 is an equidigital number, since it uses as much as digits as its factorization.

123243124231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7249595560.

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

Adding to 123243124231 its reverse (132421342321), we get a palindrome (255664466552).

The spelling of 123243124231 in words is "one hundred twenty-three billion, two hundred forty-three million, one hundred twenty-four thousand, two hundred thirty-one".