171122020 has 24 divisors (see below), whose sum is σ = 364722624. Its totient is φ = 67426656.

The previous prime is 171121981. The next prime is 171122053. The reversal of 171122020 is 20221171.

It is a junction number, because it is equal to n+sod(n) for n = 171121985 and 171122003.

It is an unprimeable number.

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, 62512 + ... + 65191.

It is an arithmetic number, because the mean of its divisors is an integer number (15196776).

Almost surely, 2^171122020 is an apocalyptic number.

171122020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

171122020 is an abundant number, since it is smaller than the sum of its proper divisors (193600604).

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

171122020 is a wasteful number, since it uses less digits than its factorization.

171122020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127779 (or 127777 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 171122020 is about 13081.3615499305. The cubic root of 171122020 is about 555.1819007144.

Adding to 171122020 its reverse (20221171), we get a palindrome (191343191).

The spelling of 171122020 in words is "one hundred seventy-one million, one hundred twenty-two thousand, twenty".