123354435510123 has 32 divisors (see below), whose sum is σ = 174123488774400. Its totient is φ = 77543963715456.

The previous prime is 123354435510091. The next prime is 123354435510149. The reversal of 123354435510123 is 321015534453321.

It is not a de Polignac number, because 123354435510123 - 2⁵ = 123354435510091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123354435517123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26732868 + ... + 31005726.

It is an arithmetic number, because the mean of its divisors is an integer number (5441359024200).

Almost surely, 2^{123354435510123} is an apocalyptic number.

123354435510123 is a deficient number, since it is larger than the sum of its proper divisors (50769053264277).

123354435510123 is a wasteful number, since it uses less digits than its factorization.

123354435510123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4280651.

The product of its (nonzero) digits is 648000, while the sum is 42.

Adding to 123354435510123 its reverse (321015534453321), we get a palindrome (444369969963444).

The spelling of 123354435510123 in words is "one hundred twenty-three trillion, three hundred fifty-four billion, four hundred thirty-five million, five hundred ten thousand, one hundred twenty-three".