11109491011 has 2 divisors, whose sum is σ = 11109491012. Its totient is φ = 11109491010.

The previous prime is 11109490957. The next prime is 11109491017. The reversal of 11109491011 is 11019490111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11109491011 - 2⁷ = 11109490883 is a prime.

It is not a weakly prime, because it can be changed into another prime (11109491017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5554745505 + 5554745506.

It is an arithmetic number, because the mean of its divisors is an integer number (5554745506).

Almost surely, 2^11109491011 is an apocalyptic number.

11109491011 is a deficient number, since it is larger than the sum of its proper divisors (1).

11109491011 is an equidigital number, since it uses as much as digits as its factorization.

11109491011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 28.

The spelling of 11109491011 in words is "eleven billion, one hundred nine million, four hundred ninety-one thousand, eleven".