105020050505 has 4 divisors (see below), whose sum is σ = 126024060612. Its totient is φ = 84016040400.

The previous prime is 105020050489. The next prime is 105020050529. The reversal of 105020050505 is 505050020501.

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 35042342416 + 69977708089 = 187196^2 + 264533^2 .

It is not a de Polignac number, because 105020050505 - 2⁴ = 105020050489 is a prime.

It is a super-2 number, since 2×105020050505² (a number of 23 digits) contains 22 as substring.

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, 10502005046 + ... + 10502005055.

It is an arithmetic number, because the mean of its divisors is an integer number (31506015153).

Almost surely, 2^105020050505 is an apocalyptic number.

It is an amenable number.

105020050505 is a deficient number, since it is larger than the sum of its proper divisors (21004010107).

105020050505 is an equidigital number, since it uses as much as digits as its factorization.

105020050505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21004010106.

The product of its (nonzero) digits is 1250, while the sum is 23.

The spelling of 105020050505 in words is "one hundred five billion, twenty million, fifty thousand, five hundred five".