313310220221 has 4 divisors (see below), whose sum is σ = 313312217244. Its totient is φ = 313308223200.

The previous prime is 313310220211. The next prime is 313310220227. The reversal of 313310220221 is 122022013313.

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 115182856996 + 198127363225 = 339386^2 + 445115^2 .

It is a cyclic number.

It is not a de Polignac number, because 313310220221 - 2¹⁴ = 313310203837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 313310220193 and 313310220202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313310220227) 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, 741050 + ... + 1084331.

It is an arithmetic number, because the mean of its divisors is an integer number (78328054311).

Almost surely, 2^313310220221 is an apocalyptic number.

It is an amenable number.

313310220221 is a deficient number, since it is larger than the sum of its proper divisors (1997023).

313310220221 is a wasteful number, since it uses less digits than its factorization.

313310220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1997022.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 313310220221 its reverse (122022013313), we get a palindrome (435332233534).

The spelling of 313310220221 in words is "three hundred thirteen billion, three hundred ten million, two hundred twenty thousand, two hundred twenty-one".