4431420303221 has 2 divisors, whose sum is σ = 4431420303222. Its totient is φ = 4431420303220.

The previous prime is 4431420303217. The next prime is 4431420303259. The reversal of 4431420303221 is 1223030241344.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2731301602225 + 1700118700996 = 1652665^2 + 1303886^2 .

It is a cyclic number.

It is not a de Polignac number, because 4431420303221 - 2² = 4431420303217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4431420303421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2215710151610 + 2215710151611.

It is an arithmetic number, because the mean of its divisors is an integer number (2215710151611).

Almost surely, 2^{4431420303221} is an apocalyptic number.

It is an amenable number.

4431420303221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4431420303221 is an equidigital number, since it uses as much as digits as its factorization.

4431420303221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 4431420303221 its reverse (1223030241344), we get a palindrome (5654450544565).

The spelling of 4431420303221 in words is "four trillion, four hundred thirty-one billion, four hundred twenty million, three hundred three thousand, two hundred twenty-one".