20011100002111 has 2 divisors, whose sum is σ = 20011100002112. Its totient is φ = 20011100002110.

The previous prime is 20011100002109. The next prime is 20011100002141. The reversal of 20011100002111 is 11120000111002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20011100002111 - 2¹ = 20011100002109 is a prime.

Together with 20011100002109, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20011100002141) 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, 10005550001055 + 10005550001056.

It is an arithmetic number, because the mean of its divisors is an integer number (10005550001056).

Almost surely, 2^{20011100002111} is an apocalyptic number.

20011100002111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011100002111 is an equidigital number, since it uses as much as digits as its factorization.

20011100002111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 20011100002111 its reverse (11120000111002), we get a palindrome (31131100113113).

The spelling of 20011100002111 in words is "twenty trillion, eleven billion, one hundred million, two thousand, one hundred eleven".