123534211005 has 24 divisors (see below), whose sum is σ = 214174291968. Its totient is φ = 65870042976.

The previous prime is 123534210997. The next prime is 123534211079. The reversal of 123534211005 is 500112435321.

123534211005 is a `hidden beast` number, since 1 + 2 + 3 + 534 + 21 + 100 + 5 = 666.

It is not a de Polignac number, because 123534211005 - 2³ = 123534210997 is a prime.

It is a super-2 number, since 2×123534211005² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123534211005.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 106717 + ... + 508386.

It is an arithmetic number, because the mean of its divisors is an integer number (8923928832).

Almost surely, 2^123534211005 is an apocalyptic number.

123534211005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123534211005 is a deficient number, since it is larger than the sum of its proper divisors (90640080963).

123534211005 is a wasteful number, since it uses less digits than its factorization.

123534211005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619577 (or 619574 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 123534211005 its reverse (500112435321), we get a palindrome (623646646326).

The spelling of 123534211005 in words is "one hundred twenty-three billion, five hundred thirty-four million, two hundred eleven thousand, five".