11001111010091 has 2 divisors, whose sum is σ = 11001111010092. Its totient is φ = 11001111010090.

The previous prime is 11001111010069. The next prime is 11001111010147. The reversal of 11001111010091 is 19001011110011.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11001111010091 - 2¹⁸ = 11001110747947 is a prime.

It is not a weakly prime, because it can be changed into another prime (11001111010061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500555505045 + 5500555505046.

It is an arithmetic number, because the mean of its divisors is an integer number (5500555505046).

Almost surely, 2^{11001111010091} is an apocalyptic number.

11001111010091 is a deficient number, since it is larger than the sum of its proper divisors (1).

11001111010091 is an equidigital number, since it uses as much as digits as its factorization.

11001111010091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9, while the sum is 17.

The spelling of 11001111010091 in words is "eleven trillion, one billion, one hundred eleven million, ten thousand, ninety-one".