121611317 has 4 divisors (see below), whose sum is σ = 121809036. Its totient is φ = 121413600.

The previous prime is 121611311. The next prime is 121611337. The reversal of 121611317 is 713116121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 713116121 = 2293 ⋅310997.

It can be written as a sum of positive squares in 2 ways, for example, as 37136836 + 84474481 = 6094^2 + 9191^2 .

It is a cyclic number.

It is not a de Polignac number, because 121611317 - 2⁶ = 121611253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121611292 and 121611301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121611311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97934 + ... + 99167.

It is an arithmetic number, because the mean of its divisors is an integer number (30452259).

Almost surely, 2^121611317 is an apocalyptic number.

It is an amenable number.

121611317 is a deficient number, since it is larger than the sum of its proper divisors (197719).

121611317 is an equidigital number, since it uses as much as digits as its factorization.

121611317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197718.

The product of its digits is 252, while the sum is 23.

The square root of 121611317 is about 11027.7521281538. The cubic root of 121611317 is about 495.4403006844.

Adding to 121611317 its reverse (713116121), we get a palindrome (834727438).

The spelling of 121611317 in words is "one hundred twenty-one million, six hundred eleven thousand, three hundred seventeen".