171210101012105 has 4 divisors (see below), whose sum is σ = 205452121214532. Its totient is φ = 136968080809680.

The previous prime is 171210101012059. The next prime is 171210101012123. The reversal of 171210101012105 is 501210101012171.

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 20444314928521 + 150765786083584 = 4521539^2 + 12278672^2 .

It is a de Polignac number, because none of the positive numbers 2^k-171210101012105 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17121010101206 + ... + 17121010101215.

It is an arithmetic number, because the mean of its divisors is an integer number (51363030303633).

Almost surely, 2^{171210101012105} is an apocalyptic number.

It is an amenable number.

171210101012105 is a deficient number, since it is larger than the sum of its proper divisors (34242020202427).

171210101012105 is an equidigital number, since it uses as much as digits as its factorization.

171210101012105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34242020202426.

The product of its (nonzero) digits is 140, while the sum is 23.

Adding to 171210101012105 its reverse (501210101012171), we get a palindrome (672420202024276).

The spelling of 171210101012105 in words is "one hundred seventy-one trillion, two hundred ten billion, one hundred one million, twelve thousand, one hundred five".