4404204451021 has 2 divisors, whose sum is σ = 4404204451022. Its totient is φ = 4404204451020.

The previous prime is 4404204450991. The next prime is 4404204451039. The reversal of 4404204451021 is 1201544024044.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2796874932996 + 1607329518025 = 1672386^2 + 1267805^2 .

It is a cyclic number.

It is not a de Polignac number, because 4404204451021 - 2¹⁵ = 4404204418253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4404204451051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2202102225510 + 2202102225511.

It is an arithmetic number, because the mean of its divisors is an integer number (2202102225511).

Almost surely, 2^{4404204451021} is an apocalyptic number.

It is an amenable number.

4404204451021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4404204451021 is an equidigital number, since it uses as much as digits as its factorization.

4404204451021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20480, while the sum is 31.

Adding to 4404204451021 its reverse (1201544024044), we get a palindrome (5605748475065).

The spelling of 4404204451021 in words is "four trillion, four hundred four billion, two hundred four million, four hundred fifty-one thousand, twenty-one".