2100510305105 has 4 divisors (see below), whose sum is σ = 2520612366132. Its totient is φ = 1680408244080.

The previous prime is 2100510305039. The next prime is 2100510305141. The reversal of 2100510305105 is 5015030150012.

It is a happy number.

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 233986005841 + 1866524299264 = 483721^2 + 1366208^2 .

It is not a de Polignac number, because 2100510305105 - 2³⁰ = 2099436563281 is a prime.

It is a super-2 number, since 2×2100510305105² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon 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, 210051030506 + ... + 210051030515.

It is an arithmetic number, because the mean of its divisors is an integer number (630153091533).

Almost surely, 2^{2100510305105} is an apocalyptic number.

It is an amenable number.

2100510305105 is a deficient number, since it is larger than the sum of its proper divisors (420102061027).

2100510305105 is an equidigital number, since it uses as much as digits as its factorization.

2100510305105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420102061026.

The product of its (nonzero) digits is 750, while the sum is 23.

Adding to 2100510305105 its reverse (5015030150012), we get a palindrome (7115540455117).

The spelling of 2100510305105 in words is "two trillion, one hundred billion, five hundred ten million, three hundred five thousand, one hundred five".