12105570205 has 16 divisors (see below), whose sum is σ = 15671412144. Its totient is φ = 8942801920.

The previous prime is 12105570203. The next prime is 12105570229. The reversal of 12105570205 is 50207550121.

It can be written as a sum of positive squares in 8 ways, for example, as 711929124 + 11393641081 = 26682^2 + 106741^2 .

It is not a de Polignac number, because 12105570205 - 2¹ = 12105570203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12105570203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1339066 + ... + 1348075.

It is an arithmetic number, because the mean of its divisors is an integer number (979463259).

Almost surely, 2^12105570205 is an apocalyptic number.

It is an amenable number.

12105570205 is a deficient number, since it is larger than the sum of its proper divisors (3565841939).

12105570205 is a wasteful number, since it uses less digits than its factorization.

12105570205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2687216.

The product of its (nonzero) digits is 3500, while the sum is 28.

The spelling of 12105570205 in words is "twelve billion, one hundred five million, five hundred seventy thousand, two hundred five".