317210121 has 16 divisors (see below), whose sum is σ = 471916800. Its totient is φ = 210584304.

The previous prime is 317210099. The next prime is 317210129. The reversal of 317210121 is 121012713.

It is a happy number.

It is not a de Polignac number, because 317210121 - 2⁶ = 317210057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 317210094 and 317210103.

It is not an unprimeable number, because it can be changed into a prime (317210129) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 18126 + ... + 31031.

It is an arithmetic number, because the mean of its divisors is an integer number (29494800).

Almost surely, 2^317210121 is an apocalyptic number.

It is an amenable number.

317210121 is a deficient number, since it is larger than the sum of its proper divisors (154706679).

317210121 is a wasteful number, since it uses less digits than its factorization.

317210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49405 (or 49399 counting only the distinct ones).

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

The square root of 317210121 is about 17810.3936228260. The cubic root of 317210121 is about 681.9968130213.

Adding to 317210121 its reverse (121012713), we get a palindrome (438222834).

The spelling of 317210121 in words is "three hundred seventeen million, two hundred ten thousand, one hundred twenty-one".