123013205242245 has 12 divisors (see below), whose sum is σ = 213222889086636. Its totient is φ = 65607042795840.

The previous prime is 123013205242241. The next prime is 123013205242253. The reversal of 123013205242245 is 542242502310321.

123013205242245 is a `hidden beast` number, since 1 + 2 + 3 + 0 + 1 + 320 + 52 + 42 + 245 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 76100376943809 + 46912828298436 = 8723553^2 + 6849294^2 .

It is not a de Polignac number, because 123013205242245 - 2² = 123013205242241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123013205242241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1366813391536 + ... + 1366813391625.

It is an arithmetic number, because the mean of its divisors is an integer number (17768574090553).

Almost surely, 2^{123013205242245} is an apocalyptic number.

123013205242245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123013205242245 is a deficient number, since it is larger than the sum of its proper divisors (90209683844391).

123013205242245 is a wasteful number, since it uses less digits than its factorization.

123013205242245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2733626783172 (or 2733626783169 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 123013205242245 its reverse (542242502310321), we get a palindrome (665255707552566).

The spelling of 123013205242245 in words is "one hundred twenty-three trillion, thirteen billion, two hundred five million, two hundred forty-two thousand, two hundred forty-five".