105173670221 has 4 divisors (see below), whose sum is σ = 105186406752. Its totient is φ = 105160933692.

The previous prime is 105173670139. The next prime is 105173670253. The reversal of 105173670221 is 122076371501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122076371501 = 7 ⋅17439481643.

It is a cyclic number.

It is not a de Polignac number, because 105173670221 - 2³⁰ = 104099928397 is a prime.

It is a super-2 number, since 2×105173670221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105133670221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6355871 + ... + 6372396.

It is an arithmetic number, because the mean of its divisors is an integer number (26296601688).

Almost surely, 2^105173670221 is an apocalyptic number.

It is an amenable number.

105173670221 is a deficient number, since it is larger than the sum of its proper divisors (12736531).

105173670221 is an equidigital number, since it uses as much as digits as its factorization.

105173670221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12736530.

The product of its (nonzero) digits is 17640, while the sum is 35.

The spelling of 105173670221 in words is "one hundred five billion, one hundred seventy-three million, six hundred seventy thousand, two hundred twenty-one".