313330211221 has 4 divisors (see below), whose sum is σ = 314953684012. Its totient is φ = 311706738432.

The previous prime is 313330211167. The next prime is 313330211261. The reversal of 313330211221 is 122112033313.

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 33742016100 + 279588195121 = 183690^2 + 528761^2 .

It is a cyclic number.

It is not a de Polignac number, because 313330211221 - 2⁷ = 313330211093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 313330211192 and 313330211201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313330211261) 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, 811736106 + ... + 811736491.

It is an arithmetic number, because the mean of its divisors is an integer number (78738421003).

Almost surely, 2^313330211221 is an apocalyptic number.

It is an amenable number.

313330211221 is a deficient number, since it is larger than the sum of its proper divisors (1623472791).

313330211221 is a wasteful number, since it uses less digits than its factorization.

313330211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1623472790.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 313330211221 its reverse (122112033313), we get a palindrome (435442244534).

The spelling of 313330211221 in words is "three hundred thirteen billion, three hundred thirty million, two hundred eleven thousand, two hundred twenty-one".