313201031221 has 8 divisors (see below), whose sum is σ = 337345810200. Its totient is φ = 289063736832.

The previous prime is 313201031203. The next prime is 313201031249. The reversal of 313201031221 is 122130102313.

It can be written as a sum of positive squares in 4 ways, for example, as 145076430321 + 168124600900 = 380889^2 + 410030^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 313201031221 - 2⁵ = 313201031189 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 (313201031251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1784080 + ... + 1951753.

It is an arithmetic number, because the mean of its divisors is an integer number (42168226275).

Almost surely, 2^313201031221 is an apocalyptic number.

It is an amenable number.

313201031221 is a deficient number, since it is larger than the sum of its proper divisors (24144778979).

313201031221 is a wasteful number, since it uses less digits than its factorization.

313201031221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3742295.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 313201031221 its reverse (122130102313), we get a palindrome (435331133534).

The spelling of 313201031221 in words is "three hundred thirteen billion, two hundred one million, thirty-one thousand, two hundred twenty-one".