313133330221 has 4 divisors (see below), whose sum is σ = 313298052444. Its totient is φ = 312968608000.

The previous prime is 313133330201. The next prime is 313133330249. The reversal of 313133330221 is 122033331313.

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

It can be written as a sum of positive squares in 2 ways, for example, as 85617686025 + 227515644196 = 292605^2 + 476986^2 .

It is a cyclic number.

It is not a de Polignac number, because 313133330221 - 2¹⁷ = 313133199149 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 (313133330201) 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, 82358260 + ... + 82362061.

It is an arithmetic number, because the mean of its divisors is an integer number (78324513111).

Almost surely, 2^313133330221 is an apocalyptic number.

It is an amenable number.

313133330221 is a deficient number, since it is larger than the sum of its proper divisors (164722223).

313133330221 is a wasteful number, since it uses less digits than its factorization.

313133330221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164722222.

The product of its (nonzero) digits is 2916, while the sum is 25.

Adding to 313133330221 its reverse (122033331313), we get a palindrome (435166661534).

The spelling of 313133330221 in words is "three hundred thirteen billion, one hundred thirty-three million, three hundred thirty thousand, two hundred twenty-one".