317657120221 has 8 divisors (see below), whose sum is σ = 363640768064. Its totient is φ = 271824487200.

The previous prime is 317657120159. The next prime is 317657120299. The reversal of 317657120221 is 122021756713.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 317657120221 - 2⁷ = 317657120093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (317657120021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37749195 + ... + 37757608.

It is an arithmetic number, because the mean of its divisors is an integer number (45455096008).

Almost surely, 2^317657120221 is an apocalyptic number.

It is an amenable number.

317657120221 is a deficient number, since it is larger than the sum of its proper divisors (45983647843).

317657120221 is an equidigital number, since it uses as much as digits as its factorization.

317657120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75507411.

The product of its (nonzero) digits is 35280, while the sum is 37.

Adding to 317657120221 its reverse (122021756713), we get a palindrome (439678876934).

The spelling of 317657120221 in words is "three hundred seventeen billion, six hundred fifty-seven million, one hundred twenty thousand, two hundred twenty-one".