4221346321 has 4 divisors (see below), whose sum is σ = 4222616944. Its totient is φ = 4220075700.

The previous prime is 4221346309. The next prime is 4221346333. The reversal of 4221346321 is 1236431224.

It is a happy number.

4221346321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 an interprime number because it is at equal distance from previous prime (4221346309) and next prime (4221346333).

It is a cyclic number.

It is not a de Polignac number, because 4221346321 - 2²¹ = 4219249169 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4221346321.

It is not an unprimeable number, because it can be changed into a prime (4221346301) 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, 630315 + ... + 636976.

It is an arithmetic number, because the mean of its divisors is an integer number (1055654236).

Almost surely, 2^4221346321 is an apocalyptic number.

It is an amenable number.

4221346321 is a deficient number, since it is larger than the sum of its proper divisors (1270623).

4221346321 is a wasteful number, since it uses less digits than its factorization.

4221346321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270622.

The product of its digits is 6912, while the sum is 28.

The square root of 4221346321 is about 64971.8886981131. Note that the first 3 decimals coincide. The cubic root of 4221346321 is about 1616.1574223797.

Adding to 4221346321 its reverse (1236431224), we get a palindrome (5457777545).

The spelling of 4221346321 in words is "four billion, two hundred twenty-one million, three hundred forty-six thousand, three hundred twenty-one".