121223313313 has 4 divisors (see below), whose sum is σ = 121224236848. Its totient is φ = 121222389780.

The previous prime is 121223313307. The next prime is 121223313347. The reversal of 121223313313 is 313313322121.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 313313322121 = 5479 ⋅57184399.

It is a cyclic number.

It is not a de Polignac number, because 121223313313 - 2³³ = 112633378721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121223313373) 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, 224103 + ... + 540988.

It is an arithmetic number, because the mean of its divisors is an integer number (30306059212).

Almost surely, 2^121223313313 is an apocalyptic number.

It is an amenable number.

121223313313 is a deficient number, since it is larger than the sum of its proper divisors (923535).

121223313313 is an equidigital number, since it uses as much as digits as its factorization.

121223313313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923534.

The product of its digits is 1944, while the sum is 25.

Adding to 121223313313 its reverse (313313322121), we get a palindrome (434536635434).

The spelling of 121223313313 in words is "one hundred twenty-one billion, two hundred twenty-three million, three hundred thirteen thousand, three hundred thirteen".