121317 has 16 divisors (see below), whose sum is σ = 190080. Its totient is φ = 67392.

The previous prime is 121313. The next prime is 121321. The reversal of 121317 is 713121.

It is an interprime number because it is at equal distance from previous prime (121313) and next prime (121321).

It is not a de Polignac number, because 121317 - 2² = 121313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121296 and 121305.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 121317.

It is not an unprimeable number, because it can be changed into a prime (121313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1059 + ... + 1167.

It is an arithmetic number, because the mean of its divisors is an integer number (11880).

2¹²¹³¹⁷ is an apocalyptic number.

It is an amenable number.

121317 is a deficient number, since it is larger than the sum of its proper divisors (68763).

121317 is a wasteful number, since it uses less digits than its factorization.

121317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172.

The product of its digits is 42, while the sum is 15.

The square root of 121317 is about 348.3059000362. The cubic root of 121317 is about 49.5040298729.

Adding to 121317 its reverse (713121), we get a palindrome (834438).

The spelling of 121317 in words is "one hundred twenty-one thousand, three hundred seventeen", and thus it is an iban number.