20011000111 has 2 divisors, whose sum is σ = 20011000112. Its totient is φ = 20011000110.

The previous prime is 20011000099. The next prime is 20011000147. The reversal of 20011000111 is 11100011002.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20011000111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20011000094 and 20011000103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20011000511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005500055 + 10005500056.

It is an arithmetic number, because the mean of its divisors is an integer number (10005500056).

Almost surely, 2^20011000111 is an apocalyptic number.

20011000111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011000111 is an equidigital number, since it uses as much as digits as its factorization.

20011000111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 20011000111 its reverse (11100011002), we get a palindrome (31111011113).

The spelling of 20011000111 in words is "twenty billion, eleven million, one hundred eleven", and thus it is an aban number.