4434242401021 has 2 divisors, whose sum is σ = 4434242401022. Its totient is φ = 4434242401020.

The previous prime is 4434242401013. The next prime is 4434242401051. The reversal of 4434242401021 is 1201042424344.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3648291002500 + 785951398521 = 1910050^2 + 886539^2 .

It is a cyclic number.

It is not a de Polignac number, because 4434242401021 - 2³ = 4434242401013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4434242401051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2217121200510 + 2217121200511.

It is an arithmetic number, because the mean of its divisors is an integer number (2217121200511).

Almost surely, 2^{4434242401021} is an apocalyptic number.

It is an amenable number.

4434242401021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4434242401021 is an equidigital number, since it uses as much as digits as its factorization.

4434242401021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 4434242401021 its reverse (1201042424344), we get a palindrome (5635284825365).

The spelling of 4434242401021 in words is "four trillion, four hundred thirty-four billion, two hundred forty-two million, four hundred one thousand, twenty-one".