2105124305 has 4 divisors (see below), whose sum is σ = 2526149172. Its totient is φ = 1684099440.

The previous prime is 2105124283. The next prime is 2105124311. The reversal of 2105124305 is 5034215012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1560882064 + 544242241 = 39508^2 + 23329^2 .

It is not a de Polignac number, because 2105124305 - 2²⁴ = 2088347089 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 210512426 + ... + 210512435.

It is an arithmetic number, because the mean of its divisors is an integer number (631537293).

Almost surely, 2^2105124305 is an apocalyptic number.

It is an amenable number.

2105124305 is a deficient number, since it is larger than the sum of its proper divisors (421024867).

2105124305 is an equidigital number, since it uses as much as digits as its factorization.

2105124305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421024866.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 2105124305 is about 45881.6336348217. The cubic root of 2105124305 is about 1281.6199186331.

Adding to 2105124305 its reverse (5034215012), we get a palindrome (7139339317).

The spelling of 2105124305 in words is "two billion, one hundred five million, one hundred twenty-four thousand, three hundred five".