11128811 has 2 divisors, whose sum is σ = 11128812. Its totient is φ = 11128810.

The previous prime is 11128771. The next prime is 11128853. The reversal of 11128811 is 11882111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11128811 - 2²² = 6934507 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11128861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5564405 + 5564406.

It is an arithmetic number, because the mean of its divisors is an integer number (5564406).

Almost surely, 2^11128811 is an apocalyptic number.

11128811 is a deficient number, since it is larger than the sum of its proper divisors (1).

11128811 is an equidigital number, since it uses as much as digits as its factorization.

11128811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 128, while the sum is 23.

The square root of 11128811 is about 3335.9872601675. The cubic root of 11128811 is about 223.2627427208.

The spelling of 11128811 in words is "eleven million, one hundred twenty-eight thousand, eight hundred eleven".