121683313 has 4 divisors (see below), whose sum is σ = 122001408. Its totient is φ = 121365220.

The previous prime is 121683293. The next prime is 121683319. The reversal of 121683313 is 313386121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 313386121 = 239 ⋅1311239.

It is a cyclic number.

It is not a de Polignac number, because 121683313 - 2⁹ = 121682801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121683319) 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, 158473 + ... + 159238.

It is an arithmetic number, because the mean of its divisors is an integer number (30500352).

Almost surely, 2^121683313 is an apocalyptic number.

It is an amenable number.

121683313 is a deficient number, since it is larger than the sum of its proper divisors (318095).

121683313 is an equidigital number, since it uses as much as digits as its factorization.

121683313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318094.

The product of its digits is 2592, while the sum is 28.

The square root of 121683313 is about 11031.0159550243. The cubic root of 121683313 is about 495.5380511352.

The spelling of 121683313 in words is "one hundred twenty-one million, six hundred eighty-three thousand, three hundred thirteen".