11119991111 has 2 divisors, whose sum is σ = 11119991112. Its totient is φ = 11119991110.

The previous prime is 11119991089. The next prime is 11119991119.

11119991111 is nontrivially palindromic in base 10.

It is a strong prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 11119991111 - 2¹⁴ = 11119974727 is a prime.

It is a zygodrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11119991119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5559995555 + 5559995556.

It is an arithmetic number, because the mean of its divisors is an integer number (5559995556).

Almost surely, 2^11119991111 is an apocalyptic number.

11119991111 is a deficient number, since it is larger than the sum of its proper divisors (1).

11119991111 is an equidigital number, since it uses as much as digits as its factorization.

11119991111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 729, while the sum is 35.

The spelling of 11119991111 in words is "eleven billion, one hundred nineteen million, nine hundred ninety-one thousand, one hundred eleven".