2101313705 has 4 divisors (see below), whose sum is σ = 2521576452. Its totient is φ = 1681050960.

The previous prime is 2101313701. The next prime is 2101313707. The reversal of 2101313705 is 5073131012.

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 596727184 + 1504586521 = 24428^2 + 38789^2 .

It is not a de Polignac number, because 2101313705 - 2² = 2101313701 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2101313701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210131366 + ... + 210131375.

It is an arithmetic number, because the mean of its divisors is an integer number (630394113).

Almost surely, 2^2101313705 is an apocalyptic number.

It is an amenable number.

2101313705 is a deficient number, since it is larger than the sum of its proper divisors (420262747).

2101313705 is an equidigital number, since it uses as much as digits as its factorization.

2101313705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420262746.

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 2101313705 is about 45840.0884052376. The cubic root of 2101313705 is about 1280.8461415863.

Adding to 2101313705 its reverse (5073131012), we get a palindrome (7174444717).

The spelling of 2101313705 in words is "two billion, one hundred one million, three hundred thirteen thousand, seven hundred five".