4004440324421 has 2 divisors, whose sum is σ = 4004440324422. Its totient is φ = 4004440324420.

The previous prime is 4004440324361. The next prime is 4004440324441. The reversal of 4004440324421 is 1244230444004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3387123691396 + 617316633025 = 1840414^2 + 785695^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4004440324421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4004440324441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2002220162210 + 2002220162211.

It is an arithmetic number, because the mean of its divisors is an integer number (2002220162211).

Almost surely, 2^{4004440324421} is an apocalyptic number.

It is an amenable number.

4004440324421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4004440324421 is an equidigital number, since it uses as much as digits as its factorization.

4004440324421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 49152, while the sum is 32.

Adding to 4004440324421 its reverse (1244230444004), we get a palindrome (5248670768425).

The spelling of 4004440324421 in words is "four trillion, four billion, four hundred forty million, three hundred twenty-four thousand, four hundred twenty-one".