171221002112 has 32 divisors (see below), whose sum is σ = 341181172920. Its totient is φ = 85591217664.

The previous prime is 171221002093. The next prime is 171221002133. The reversal of 171221002112 is 211200122171.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent 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, 428498 + ... + 725294.

Almost surely, 2^171221002112 is an apocalyptic number.

It is an amenable number.

171221002112 is a deficient number, since it is larger than the sum of its proper divisors (169960170808).

171221002112 is an equidigital number, since it uses as much as digits as its factorization.

171221002112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301318 (or 301306 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 20.

Adding to 171221002112 its reverse (211200122171), we get a palindrome (382421124283).

The spelling of 171221002112 in words is "one hundred seventy-one billion, two hundred twenty-one million, two thousand, one hundred twelve".