2111191111111 has 2 divisors, whose sum is σ = 2111191111112. Its totient is φ = 2111191111110.

The previous prime is 2111191111093. The next prime is 2111191111129. The reversal of 2111191111111 is 1111111911112.

It is a m-pointer prime, because the next prime (2111191111129) can be obtained adding 2111191111111 to its product of digits (18).

It is a balanced prime because it is at equal distance from previous prime (2111191111093) and next prime (2111191111129).

It is a cyclic number.

It is not a de Polignac number, because 2111191111111 - 2¹¹ = 2111191109063 is a prime.

2111191111111 is a modest number, since divided by 1111111 gives 211119 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2111191111811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055595555555 + 1055595555556.

It is an arithmetic number, because the mean of its divisors is an integer number (1055595555556).

Almost surely, 2^{2111191111111} is an apocalyptic number.

2111191111111 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111191111111 is an equidigital number, since it uses as much as digits as its factorization.

2111191111111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18, while the sum is 22.

The spelling of 2111191111111 in words is "two trillion, one hundred eleven billion, one hundred ninety-one million, one hundred eleven thousand, one hundred eleven".