171211662120 has 32 divisors (see below), whose sum is σ = 513634986720. Its totient is φ = 45656443200.

The previous prime is 171211662101. The next prime is 171211662197. The reversal of 171211662120 is 21266112171.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 713381806 + ... + 713382045.

It is an arithmetic number, because the mean of its divisors is an integer number (16051093335).

Almost surely, 2^171211662120 is an apocalyptic number.

171211662120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

171211662120 is an abundant number, since it is smaller than the sum of its proper divisors (342423324600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

171211662120 is a wasteful number, since it uses less digits than its factorization.

171211662120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1426763865 (or 1426763861 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 30.

Adding to 171211662120 its reverse (21266112171), we get a palindrome (192477774291).

The spelling of 171211662120 in words is "one hundred seventy-one billion, two hundred eleven million, six hundred sixty-two thousand, one hundred twenty".