321013113221 has 4 divisors (see below), whose sum is σ = 321015179244. Its totient is φ = 321011047200.

The previous prime is 321013113199. The next prime is 321013113259. The reversal of 321013113221 is 122311310123.

It is a happy number.

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 246681088900 + 74332024321 = 496670^2 + 272639^2 .

It is a cyclic number.

It is not a de Polignac number, because 321013113221 - 2³⁴ = 303833244037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321013113193 and 321013113202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321013113121) 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, 779150 + ... + 1117631.

It is an arithmetic number, because the mean of its divisors is an integer number (80253794811).

Almost surely, 2^321013113221 is an apocalyptic number.

It is an amenable number.

321013113221 is a deficient number, since it is larger than the sum of its proper divisors (2066023).

321013113221 is a wasteful number, since it uses less digits than its factorization.

321013113221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2066022.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 321013113221 its reverse (122311310123), we get a palindrome (443324423344).

The spelling of 321013113221 in words is "three hundred twenty-one billion, thirteen million, one hundred thirteen thousand, two hundred twenty-one".