171221199 has 8 divisors (see below), whose sum is σ = 230648880. Its totient is φ = 112970496.

The previous prime is 171221147. The next prime is 171221201. The reversal of 171221199 is 991122171.

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

It is not a de Polignac number, because 171221199 - 2¹¹ = 171219151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171221119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 293904 + ... + 294485.

It is an arithmetic number, because the mean of its divisors is an integer number (28831110).

Almost surely, 2^171221199 is an apocalyptic number.

171221199 is a deficient number, since it is larger than the sum of its proper divisors (59427681).

171221199 is an equidigital number, since it uses as much as digits as its factorization.

171221199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588489.

The product of its digits is 2268, while the sum is 33.

The square root of 171221199 is about 13085.1518523860. The cubic root of 171221199 is about 555.2891375494.

The spelling of 171221199 in words is "one hundred seventy-one million, two hundred twenty-one thousand, one hundred ninety-nine".