313121113 has 8 divisors (see below), whose sum is σ = 336976200. Its totient is φ = 289870080.

The previous prime is 313121101. The next prime is 313121119. The reversal of 313121113 is 311121313.

It can be written as a sum of positive squares in 4 ways, for example, as 5890329 + 307230784 = 2427^2 + 17528^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313121113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (313121119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149938 + ... + 152011.

It is an arithmetic number, because the mean of its divisors is an integer number (42122025).

Almost surely, 2^313121113 is an apocalyptic number.

It is an amenable number.

313121113 is a deficient number, since it is larger than the sum of its proper divisors (23855087).

313121113 is a wasteful number, since it uses less digits than its factorization.

313121113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302027.

The product of its digits is 54, while the sum is 16.

The square root of 313121113 is about 17695.2285376595. The cubic root of 313121113 is about 679.0536959668.

Adding to 313121113 its reverse (311121313), we get a palindrome (624242426).

The spelling of 313121113 in words is "three hundred thirteen million, one hundred twenty-one thousand, one hundred thirteen".