1911142111 has 2 divisors, whose sum is σ = 1911142112. Its totient is φ = 1911142110.

The previous prime is 1911142109. The next prime is 1911142133. The reversal of 1911142111 is 1112411191.

It is an a-pointer prime, because the next prime (1911142133) can be obtained adding 1911142111 to its sum of digits (22).

It is a weak prime.

It is an emirp because it is prime and its reverse (1112411191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1911142111 - 2¹ = 1911142109 is a prime.

Together with 1911142109, 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 (1911112111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 955571055 + 955571056.

It is an arithmetic number, because the mean of its divisors is an integer number (955571056).

Almost surely, 2^1911142111 is an apocalyptic number.

1911142111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1911142111 is an equidigital number, since it uses as much as digits as its factorization.

1911142111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72, while the sum is 22.

The square root of 1911142111 is about 43716.6113851474. The cubic root of 1911142111 is about 1240.9786998889.

The spelling of 1911142111 in words is "one billion, nine hundred eleven million, one hundred forty-two thousand, one hundred eleven".