123405540131043 has 10 divisors (see below), whose sum is σ = 184346547603284. Its totient is φ = 82270360087308.

The previous prime is 123405540131023. The next prime is 123405540131089. The reversal of 123405540131043 is 340131045504321.

123405540131043 is a `hidden beast` number, since 1 + 2 + 3 + 4 + 0 + 5 + 540 + 1 + 3 + 104 + 3 = 666.

It is not a de Polignac number, because 123405540131043 - 2¹⁸ = 123405539868899 is a prime.

It is a super-2 number, since 2×123405540131043² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123405540130989 and 123405540131007.

It is not an unprimeable number, because it can be changed into a prime (123405540131023) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 761762593321 + ... + 761762593482.

Almost surely, 2^{123405540131043} is an apocalyptic number.

123405540131043 is a deficient number, since it is larger than the sum of its proper divisors (60941007472241).

123405540131043 is an equidigital number, since it uses as much as digits as its factorization.

123405540131043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1523525186815 (or 1523525186806 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 123405540131043 its reverse (340131045504321), we get a palindrome (463536585635364).

The spelling of 123405540131043 in words is "one hundred twenty-three trillion, four hundred five billion, five hundred forty million, one hundred thirty-one thousand, forty-three".