313121001323443 has 4 divisors (see below), whose sum is σ = 314995977379440. Its totient is φ = 311246025267448.

The previous prime is 313121001323411. The next prime is 313121001323453. The reversal of 313121001323443 is 344323100121313.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 313121001323443 - 2⁵ = 313121001323411 is a prime.

It is a super-2 number, since 2×313121001323443² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313121001323453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 937488027748 + ... + 937488028081.

It is an arithmetic number, because the mean of its divisors is an integer number (78748994344860).

Almost surely, 2^{313121001323443} is an apocalyptic number.

313121001323443 is a deficient number, since it is larger than the sum of its proper divisors (1874976055997).

313121001323443 is a wasteful number, since it uses less digits than its factorization.

313121001323443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1874976055996.

The product of its (nonzero) digits is 15552, while the sum is 31.

Adding to 313121001323443 its reverse (344323100121313), we get a palindrome (657444101444756).

The spelling of 313121001323443 in words is "three hundred thirteen trillion, one hundred twenty-one billion, one million, three hundred twenty-three thousand, four hundred forty-three".