105205051051 has 4 divisors (see below), whose sum is σ = 105576800632. Its totient is φ = 104833301472.

The previous prime is 105205050997. The next prime is 105205051073. The reversal of 105205051051 is 150150502501.

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

It is a cyclic number.

It is not a de Polignac number, because 105205051051 - 2¹¹ = 105205049003 is a prime.

It is a super-2 number, since 2×105205051051² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105205051151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185874366 + ... + 185874931.

It is an arithmetic number, because the mean of its divisors is an integer number (26394200158).

Almost surely, 2^105205051051 is an apocalyptic number.

105205051051 is a deficient number, since it is larger than the sum of its proper divisors (371749581).

105205051051 is an equidigital number, since it uses as much as digits as its factorization.

105205051051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371749580.

The product of its (nonzero) digits is 1250, while the sum is 25.

Adding to 105205051051 its reverse (150150502501), we get a palindrome (255355553552).

The spelling of 105205051051 in words is "one hundred five billion, two hundred five million, fifty-one thousand, fifty-one".