313330322021 has 4 divisors (see below), whose sum is σ = 331761517452. Its totient is φ = 294899126592.

The previous prime is 313330321979. The next prime is 313330322047. The reversal of 313330322021 is 120223033313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120223033313 = 47 ⋅2557936879.

It can be written as a sum of positive squares in 2 ways, for example, as 228401791396 + 84928530625 = 477914^2 + 291425^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313330322021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313330322051) 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, 9215597690 + ... + 9215597723.

It is an arithmetic number, because the mean of its divisors is an integer number (82940379363).

Almost surely, 2^313330322021 is an apocalyptic number.

It is an amenable number.

313330322021 is a deficient number, since it is larger than the sum of its proper divisors (18431195431).

313330322021 is a wasteful number, since it uses less digits than its factorization.

313330322021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18431195430.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 313330322021 its reverse (120223033313), we get a palindrome (433553355334).

The spelling of 313330322021 in words is "three hundred thirteen billion, three hundred thirty million, three hundred twenty-two thousand, twenty-one".