4424404025021 has 2 divisors, whose sum is σ = 4424404025022. Its totient is φ = 4424404025020.

The previous prime is 4424404024987. The next prime is 4424404025029. The reversal of 4424404025021 is 1205204044244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3561576681796 + 862827343225 = 1887214^2 + 928885^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4424404025021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4424404025029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2212202012510 + 2212202012511.

It is an arithmetic number, because the mean of its divisors is an integer number (2212202012511).

Almost surely, 2^{4424404025021} is an apocalyptic number.

It is an amenable number.

4424404025021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4424404025021 is an equidigital number, since it uses as much as digits as its factorization.

4424404025021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40960, while the sum is 32.

Adding to 4424404025021 its reverse (1205204044244), we get a palindrome (5629608069265).

The spelling of 4424404025021 in words is "four trillion, four hundred twenty-four billion, four hundred four million, twenty-five thousand, twenty-one".