4432123321 has 8 divisors (see below), whose sum is σ = 4483298120. Its totient is φ = 4381060608.

The previous prime is 4432123313. The next prime is 4432123337. The reversal of 4432123321 is 1233212344.

It can be written as a sum of positive squares in 4 ways, for example, as 1913187600 + 2518935721 = 43740^2 + 50189^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 4432123321 - 2³ = 4432123313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4432123301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52855 + ... + 107971.

It is an arithmetic number, because the mean of its divisors is an integer number (560412265).

Almost surely, 2^4432123321 is an apocalyptic number.

It is an amenable number.

4432123321 is a deficient number, since it is larger than the sum of its proper divisors (51174799).

4432123321 is an equidigital number, since it uses as much as digits as its factorization.

4432123321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56043.

The product of its digits is 3456, while the sum is 25.

The square root of 4432123321 is about 66574.1941070262. The cubic root of 4432123321 is about 1642.6206515658.

Adding to 4432123321 its reverse (1233212344), we get a palindrome (5665335665).

The spelling of 4432123321 in words is "four billion, four hundred thirty-two million, one hundred twenty-three thousand, three hundred twenty-one".