4455321221 has 16 divisors (see below), whose sum is σ = 4934260800. Its totient is φ = 3997411968.

The previous prime is 4455321193. The next prime is 4455321239. The reversal of 4455321221 is 1221235544.

It is a cyclic number.

It is not a de Polignac number, because 4455321221 - 2¹⁰ = 4455320197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4455321821) 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, 35630 + ... + 100896.

It is an arithmetic number, because the mean of its divisors is an integer number (308391300).

Almost surely, 2^4455321221 is an apocalyptic number.

It is an amenable number.

4455321221 is a deficient number, since it is larger than the sum of its proper divisors (478939579).

4455321221 is a wasteful number, since it uses less digits than its factorization.

4455321221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65428.

The product of its digits is 9600, while the sum is 29.

The square root of 4455321221 is about 66748.1926421982. The cubic root of 4455321221 is about 1645.4815121429.

Adding to 4455321221 its reverse (1221235544), we get a palindrome (5676556765).

The spelling of 4455321221 in words is "four billion, four hundred fifty-five million, three hundred twenty-one thousand, two hundred twenty-one".