21444421303001 has 2 divisors, whose sum is σ = 21444421303002. Its totient is φ = 21444421303000.

The previous prime is 21444421302977. The next prime is 21444421303013. The reversal of 21444421303001 is 10030312444412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21423465845401 + 20955457600 = 4628549^2 + 144760^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21444421303001 is a prime.

It is not a weakly prime, because it can be changed into another prime (21444421303601) 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, 10722210651500 + 10722210651501.

It is an arithmetic number, because the mean of its divisors is an integer number (10722210651501).

Almost surely, 2^{21444421303001} is an apocalyptic number.

It is an amenable number.

21444421303001 is a deficient number, since it is larger than the sum of its proper divisors (1).

21444421303001 is an equidigital number, since it uses as much as digits as its factorization.

21444421303001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 21444421303001 its reverse (10030312444412), we get a palindrome (31474733747413).

It can be divided in two parts, 2144442 and 1303001, that added together give a palindrome (3447443).

The spelling of 21444421303001 in words is "twenty-one trillion, four hundred forty-four billion, four hundred twenty-one million, three hundred three thousand, one".