4453121321 has 16 divisors (see below), whose sum is σ = 5240775168. Its totient is φ = 3738259200.

The previous prime is 4453121317. The next prime is 4453121341. The reversal of 4453121321 is 1231213544.

It is a happy number.

It is not a de Polignac number, because 4453121321 - 2² = 4453121317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4453121341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214745 + ... + 234566.

It is an arithmetic number, because the mean of its divisors is an integer number (327548448).

Almost surely, 2^4453121321 is an apocalyptic number.

It is an amenable number.

4453121321 is a deficient number, since it is larger than the sum of its proper divisors (787653847).

4453121321 is a wasteful number, since it uses less digits than its factorization.

4453121321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449392.

The product of its digits is 2880, while the sum is 26.

The square root of 4453121321 is about 66731.7115095964. The cubic root of 4453121321 is about 1645.2106382403.

Adding to 4453121321 its reverse (1231213544), we get a palindrome (5684334865).

The spelling of 4453121321 in words is "four billion, four hundred fifty-three million, one hundred twenty-one thousand, three hundred twenty-one".