105212171 has 8 divisors (see below), whose sum is σ = 109261824. Its totient is φ = 101203560.

The previous prime is 105212147. The next prime is 105212183. The reversal of 105212171 is 171212501.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 105212171 - 2¹⁴ = 105195787 is a prime.

It is a super-2 number, since 2×105212171² = 22139201853066482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105212111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4985 + ... + 15338.

It is an arithmetic number, because the mean of its divisors is an integer number (13657728).

Almost surely, 2^105212171 is an apocalyptic number.

105212171 is a deficient number, since it is larger than the sum of its proper divisors (4049653).

105212171 is a wasteful number, since it uses less digits than its factorization.

105212171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20521.

The product of its (nonzero) digits is 140, while the sum is 20.

The square root of 105212171 is about 10257.2984259989. The cubic root of 105212171 is about 472.0869486353.

Adding to 105212171 its reverse (171212501), we get a palindrome (276424672).

The spelling of 105212171 in words is "one hundred five million, two hundred twelve thousand, one hundred seventy-one".