123512020545231 has 8 divisors (see below), whose sum is σ = 182980771178160. Its totient is φ = 82341347030136.

The previous prime is 123512020545229. The next prime is 123512020545241. The reversal of 123512020545231 is 132545020215321.

123512020545231 is a `hidden beast` number, since 1 + 2 + 3 + 5 + 120 + 2 + 0 + 5 + 4 + 523 + 1 = 666.

It is not a de Polignac number, because 123512020545231 - 2¹ = 123512020545229 is a prime.

It is a super-2 number, since 2×123512020545231² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123512020545211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2287259639700 + ... + 2287259639753.

It is an arithmetic number, because the mean of its divisors is an integer number (22872596397270).

Almost surely, 2^{123512020545231} is an apocalyptic number.

123512020545231 is a deficient number, since it is larger than the sum of its proper divisors (59468750632929).

123512020545231 is an equidigital number, since it uses as much as digits as its factorization.

123512020545231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4574519279462 (or 4574519279456 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 123512020545231 in words is "one hundred twenty-three trillion, five hundred twelve billion, twenty million, five hundred forty-five thousand, two hundred thirty-one".