11021111111 has 2 divisors, whose sum is σ = 11021111112. Its totient is φ = 11021111110.

The previous prime is 11021111083. The next prime is 11021111113. The reversal of 11021111111 is 11111112011.

It is a happy number.

11021111111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11021111111 - 2¹⁴ = 11021094727 is a prime.

Together with 11021111113, it forms a pair of twin primes.

It is a Chen prime.

11021111111 is a modest number, since divided by 111111 gives 11021 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 11021111092 and 11021111101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11021111113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5510555555 + 5510555556.

It is an arithmetic number, because the mean of its divisors is an integer number (5510555556).

Almost surely, 2^11021111111 is an apocalyptic number.

11021111111 is a deficient number, since it is larger than the sum of its proper divisors (1).

11021111111 is an equidigital number, since it uses as much as digits as its factorization.

11021111111 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 11.

Adding to 11021111111 its reverse (11111112011), we get a palindrome (22132223122).

The spelling of 11021111111 in words is "eleven billion, twenty-one million, one hundred eleven thousand, one hundred eleven".