313203310121 has 4 divisors (see below), whose sum is σ = 337295872452.
Its totient is φ = 289110747792.
The previous prime is 313203310097. The next prime is 313203310127. The reversal of 313203310121 is 121013302313.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121013302313 = 929 ⋅130261897.
It can be written as a sum of positive squares in 2 ways, for example, as 110779802896 + 202423507225 = 332836^2 + 449915^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-313203310121 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 313203310093 and 313203310102.
It is not an unprimeable number, because it can be changed into a prime (313203310127) 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, 12046281146 + ... + 12046281171.
It is an arithmetic number, because the mean of its divisors is an integer number (84323968113).
Almost surely, 2313203310121 is an apocalyptic number.
It is an amenable number.
313203310121 is a deficient number, since it is larger than the sum of its proper divisors (24092562331).
313203310121 is a wasteful number, since it uses less digits than its factorization.
313203310121 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 24092562330.
The product of its (nonzero) digits is 324, while the sum is 20.
Adding to 313203310121 its reverse (121013302313), we get a palindrome (434216612434).
The spelling of 313203310121 in words is "three hundred thirteen billion, two hundred three million, three hundred ten thousand, one hundred twenty-one".