123243431052431 has 2 divisors, whose sum is σ = 123243431052432. Its totient is φ = 123243431052430.

The previous prime is 123243431052419. The next prime is 123243431052433. The reversal of 123243431052431 is 134250134342321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123243431052431 - 2²² = 123243426858127 is a prime.

It is a super-3 number, since 3×123243431052431³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 123243431052433, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123243431052433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61621715526215 + 61621715526216.

It is an arithmetic number, because the mean of its divisors is an integer number (61621715526216).

Almost surely, 2^{123243431052431} is an apocalyptic number.

123243431052431 is a deficient number, since it is larger than the sum of its proper divisors (1).

123243431052431 is an equidigital number, since it uses as much as digits as its factorization.

123243431052431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 38.

Adding to 123243431052431 its reverse (134250134342321), we get a palindrome (257493565394752).

The spelling of 123243431052431 in words is "one hundred twenty-three trillion, two hundred forty-three billion, four hundred thirty-one million, fifty-two thousand, four hundred thirty-one".