12105504215 has 16 divisors (see below), whose sum is σ = 16603937280. Its totient is φ = 8299865760.

The previous prime is 12105504197. The next prime is 12105504217. The reversal of 12105504215 is 51240550121.

It is not a de Polignac number, because 12105504215 - 2¹² = 12105500119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12105504217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 344846 + ... + 378324.

It is an arithmetic number, because the mean of its divisors is an integer number (1037746080).

Almost surely, 2^12105504215 is an apocalyptic number.

12105504215 is a deficient number, since it is larger than the sum of its proper divisors (4498433065).

12105504215 is a wasteful number, since it uses less digits than its factorization.

12105504215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43822.

The product of its (nonzero) digits is 2000, while the sum is 26.

The spelling of 12105504215 in words is "twelve billion, one hundred five million, five hundred four thousand, two hundred fifteen".