172310121 has 24 divisors (see below), whose sum is σ = 259610624. Its totient is φ = 110004480.

The previous prime is 172310119. The next prime is 172310161. The reversal of 172310121 is 121013271.

It is a happy number.

172310121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 172310121 - 2¹ = 172310119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 172310094 and 172310103.

It is not an unprimeable number, because it can be changed into a prime (172310111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23880 + ... + 30246.

Almost surely, 2^172310121 is an apocalyptic number.

It is an amenable number.

172310121 is a deficient number, since it is larger than the sum of its proper divisors (87300503).

172310121 is a wasteful number, since it uses less digits than its factorization.

172310121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6501 (or 6498 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The square root of 172310121 is about 13126.6949762688. The cubic root of 172310121 is about 556.4638153566.

Adding to 172310121 its reverse (121013271), we get a palindrome (293323392).

The spelling of 172310121 in words is "one hundred seventy-two million, three hundred ten thousand, one hundred twenty-one".