12345505041205 has 16 divisors (see below), whose sum is σ = 16939114424064. Its totient is φ = 8461421130240.

The previous prime is 12345505041197. The next prime is 12345505041217. The reversal of 12345505041205 is 50214050554321.

It is not a de Polignac number, because 12345505041205 - 2³ = 12345505041197 is a prime.

It is a super-2 number, since 2×12345505041205² (a number of 27 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 84676977 + ... + 84822646.

It is an arithmetic number, because the mean of its divisors is an integer number (1058694651504).

Almost surely, 2^{12345505041205} is an apocalyptic number.

It is an amenable number.

12345505041205 is a deficient number, since it is larger than the sum of its proper divisors (4593609382859).

12345505041205 is a wasteful number, since it uses less digits than its factorization.

12345505041205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169501716.

The product of its (nonzero) digits is 120000, while the sum is 37.

Adding to 12345505041205 its reverse (50214050554321), we get a palindrome (62559555595526).

The spelling of 12345505041205 in words is "twelve trillion, three hundred forty-five billion, five hundred five million, forty-one thousand, two hundred five".