123340344431 has 2 divisors, whose sum is σ = 123340344432. Its totient is φ = 123340344430.

The previous prime is 123340344419. The next prime is 123340344469. The reversal of 123340344431 is 134443043321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123340344431 - 2³⁰ = 122266602607 is a prime.

It is a super-2 number, since 2×123340344431² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123340344481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61670172215 + 61670172216.

It is an arithmetic number, because the mean of its divisors is an integer number (61670172216).

Almost surely, 2^123340344431 is an apocalyptic number.

123340344431 is a deficient number, since it is larger than the sum of its proper divisors (1).

123340344431 is an equidigital number, since it uses as much as digits as its factorization.

123340344431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 32.

Adding to 123340344431 its reverse (134443043321), we get a palindrome (257783387752).

The spelling of 123340344431 in words is "one hundred twenty-three billion, three hundred forty million, three hundred forty-four thousand, four hundred thirty-one".