121313321 has 4 divisors (see below), whose sum is σ = 122268672. Its totient is φ = 120357972.

The previous prime is 121313317. The next prime is 121313359. The reversal of 121313321 is 123313121.

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.

It is a cyclic number.

It is not a de Polignac number, because 121313321 - 2² = 121313317 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121313321.

It is not an unprimeable number, because it can be changed into a prime (121313021) 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 3 ways as a sum of consecutive naturals, for example, 477485 + ... + 477738.

It is an arithmetic number, because the mean of its divisors is an integer number (30567168).

Almost surely, 2^121313321 is an apocalyptic number.

It is an amenable number.

121313321 is a deficient number, since it is larger than the sum of its proper divisors (955351).

121313321 is an equidigital number, since it uses as much as digits as its factorization.

121313321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955350.

The product of its digits is 108, while the sum is 17.

The square root of 121313321 is about 11014.2326559774. The cubic root of 121313321 is about 495.0352945619.

Adding to 121313321 its reverse (123313121), we get a palindrome (244626442).

The spelling of 121313321 in words is "one hundred twenty-one million, three hundred thirteen thousand, three hundred twenty-one".