12103255505 has 32 divisors (see below), whose sum is σ = 16131218688. Its totient is φ = 8716414080.

The previous prime is 12103255501. The next prime is 12103255511. The reversal of 12103255505 is 50555230121.

It is not a de Polignac number, because 12103255505 - 2² = 12103255501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12103255501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 676637 + ... + 694293.

It is an arithmetic number, because the mean of its divisors is an integer number (504100584).

Almost surely, 2^12103255505 is an apocalyptic number.

It is an amenable number.

12103255505 is a deficient number, since it is larger than the sum of its proper divisors (4027963183).

12103255505 is a wasteful number, since it uses less digits than its factorization.

12103255505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17798 (or 17776 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 29.

Adding to 12103255505 its reverse (50555230121), we get a palindrome (62658485626).

The spelling of 12103255505 in words is "twelve billion, one hundred three million, two hundred fifty-five thousand, five hundred five".