120122172 has 18 divisors (see below), whose sum is σ = 303642248. Its totient is φ = 40040712.

The previous prime is 120122111. The next prime is 120122203. The reversal of 120122172 is 271221021.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1668328 + ... + 1668399.

Almost surely, 2^120122172 is an apocalyptic number.

120122172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

120122172 is an abundant number, since it is smaller than the sum of its proper divisors (183520076).

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

120122172 is a wasteful number, since it uses less digits than its factorization.

120122172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3336737 (or 3336732 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 120122172 is about 10960.0260948594. The cubic root of 120122172 is about 493.4097481258.

Adding to 120122172 its reverse (271221021), we get a palindrome (391343193).

The spelling of 120122172 in words is "one hundred twenty million, one hundred twenty-two thousand, one hundred seventy-two".