123123143211455 has 16 divisors (see below), whose sum is σ = 149618961638400. Its totient is φ = 97251070793760.

The previous prime is 123123143211407. The next prime is 123123143211493. The reversal of 123123143211455 is 554112341321321.

It is not a de Polignac number, because 123123143211455 - 2¹⁸ = 123123142949311 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65968550 + ... + 67809260.

It is an arithmetic number, because the mean of its divisors is an integer number (9351185102400).

Almost surely, 2^{123123143211455} is an apocalyptic number.

123123143211455 is a deficient number, since it is larger than the sum of its proper divisors (26495818426945).

123123143211455 is a wasteful number, since it uses less digits than its factorization.

123123143211455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2010134.

The product of its digits is 86400, while the sum is 38.

Adding to 123123143211455 its reverse (554112341321321), we get a palindrome (677235484532776).

The spelling of 123123143211455 in words is "one hundred twenty-three trillion, one hundred twenty-three billion, one hundred forty-three million, two hundred eleven thousand, four hundred fifty-five".