11001111091811 has 2 divisors, whose sum is σ = 11001111091812. Its totient is φ = 11001111091810.

The previous prime is 11001111091799. The next prime is 11001111091813. The reversal of 11001111091811 is 11819011110011.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11001111091811 is a prime.

Together with 11001111091813, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11001111091813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500555545905 + 5500555545906.

It is an arithmetic number, because the mean of its divisors is an integer number (5500555545906).

Almost surely, 2^{11001111091811} is an apocalyptic number.

11001111091811 is a deficient number, since it is larger than the sum of its proper divisors (1).

11001111091811 is an equidigital number, since it uses as much as digits as its factorization.

11001111091811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 26.

The spelling of 11001111091811 in words is "eleven trillion, one billion, one hundred eleven million, ninety-one thousand, eight hundred eleven".