4321313221 has 4 divisors (see below), whose sum is σ = 4321955232. Its totient is φ = 4320671212.

The previous prime is 4321313219. The next prime is 4321313263. The reversal of 4321313221 is 1223131234.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4321313221 - 2¹ = 4321313219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4321313192 and 4321313201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4321313201) 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, 310801 + ... + 324406.

It is an arithmetic number, because the mean of its divisors is an integer number (1080488808).

Almost surely, 2^4321313221 is an apocalyptic number.

It is an amenable number.

4321313221 is a deficient number, since it is larger than the sum of its proper divisors (642011).

4321313221 is an equidigital number, since it uses as much as digits as its factorization.

4321313221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642010.

The product of its digits is 864, while the sum is 22.

The square root of 4321313221 is about 65736.6961521493. The cubic root of 4321313221 is about 1628.8155824143.

Adding to 4321313221 its reverse (1223131234), we get a palindrome (5544444455).

The spelling of 4321313221 in words is "four billion, three hundred twenty-one million, three hundred thirteen thousand, two hundred twenty-one".