21440301422401 has 2 divisors, whose sum is σ = 21440301422402. Its totient is φ = 21440301422400.

The previous prime is 21440301422363. The next prime is 21440301422429. The reversal of 21440301422401 is 10422410304412.

It is an a-pointer prime, because the next prime (21440301422429) can be obtained adding 21440301422401 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16631315578801 + 4808985843600 = 4078151^2 + 2192940^2 .

It is a cyclic number.

It is not a de Polignac number, because 21440301422401 - 2¹⁷ = 21440301291329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21440301422401.

It is not a weakly prime, because it can be changed into another prime (21440301422801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10720150711200 + 10720150711201.

It is an arithmetic number, because the mean of its divisors is an integer number (10720150711201).

Almost surely, 2^{21440301422401} is an apocalyptic number.

It is an amenable number.

21440301422401 is a deficient number, since it is larger than the sum of its proper divisors (1).

21440301422401 is an equidigital number, since it uses as much as digits as its factorization.

21440301422401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 21440301422401 its reverse (10422410304412), we get a palindrome (31862711726813).

The spelling of 21440301422401 in words is "twenty-one trillion, four hundred forty billion, three hundred one million, four hundred twenty-two thousand, four hundred one".