123512020545305 has 32 divisors (see below), whose sum is σ = 171320793638400. Its totient is φ = 83727846461952.

The previous prime is 123512020545289. The next prime is 123512020545337. The reversal of 123512020545305 is 503545020215321.

It is not a de Polignac number, because 123512020545305 - 2⁴ = 123512020545289 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14585831 + ... + 21442259.

It is an arithmetic number, because the mean of its divisors is an integer number (5353774801200).

Almost surely, 2^{123512020545305} is an apocalyptic number.

It is an amenable number.

123512020545305 is a deficient number, since it is larger than the sum of its proper divisors (47808773093095).

123512020545305 is an equidigital number, since it uses as much as digits as its factorization.

123512020545305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6862313.

The product of its (nonzero) digits is 180000, while the sum is 38.

The spelling of 123512020545305 in words is "one hundred twenty-three trillion, five hundred twelve billion, twenty million, five hundred forty-five thousand, three hundred five".