20111104440001 has 2 divisors, whose sum is σ = 20111104440002. Its totient is φ = 20111104440000.

The previous prime is 20111104439977. The next prime is 20111104440043. The reversal of 20111104440001 is 10004440111102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15771898818225 + 4339205621776 = 3971385^2 + 2083076^2 .

It is a cyclic number.

It is not a de Polignac number, because 20111104440001 - 2¹³ = 20111104431809 is a prime.

It is not a weakly prime, because it can be changed into another prime (20111104446001) 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, 10055552220000 + 10055552220001.

It is an arithmetic number, because the mean of its divisors is an integer number (10055552220001).

Almost surely, 2^{20111104440001} is an apocalyptic number.

It is an amenable number.

20111104440001 is a deficient number, since it is larger than the sum of its proper divisors (1).

20111104440001 is an equidigital number, since it uses as much as digits as its factorization.

20111104440001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 20111104440001 its reverse (10004440111102), we get a palindrome (30115544551103).

The spelling of 20111104440001 in words is "twenty trillion, one hundred eleven billion, one hundred four million, four hundred forty thousand, one".