20441264315221 has 2 divisors, whose sum is σ = 20441264315222. Its totient is φ = 20441264315220.

The previous prime is 20441264315159. The next prime is 20441264315231. The reversal of 20441264315221 is 12251346214402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18765236316996 + 1676027998225 = 4331886^2 + 1294615^2 .

It is a cyclic number.

It is not a de Polignac number, because 20441264315221 - 2¹⁷ = 20441264184149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20441264315231) 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, 10220632157610 + 10220632157611.

It is an arithmetic number, because the mean of its divisors is an integer number (10220632157611).

Almost surely, 2^{20441264315221} is an apocalyptic number.

It is an amenable number.

20441264315221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20441264315221 is an equidigital number, since it uses as much as digits as its factorization.

20441264315221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 92160, while the sum is 37.

The spelling of 20441264315221 in words is "twenty trillion, four hundred forty-one billion, two hundred sixty-four million, three hundred fifteen thousand, two hundred twenty-one".