11011005 has 16 divisors (see below), whose sum is σ = 19575360. Its totient is φ = 5872464.

The previous prime is 11011003. The next prime is 11011031. The reversal of 11011005 is 50011011.

It is not a de Polignac number, because 11011005 - 2¹ = 11011003 is a prime.

It is a super-2 number, since 2×11011005² = 242484462220050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40647 + ... + 40916.

It is an arithmetic number, because the mean of its divisors is an integer number (1223460).

Almost surely, 2^11011005 is an apocalyptic number.

11011005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11011005 is a deficient number, since it is larger than the sum of its proper divisors (8564355).

11011005 is an equidigital number, since it uses as much as digits as its factorization.

11011005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81577 (or 81571 counting only the distinct ones).

The product of its (nonzero) digits is 5, while the sum is 9.

The square root of 11011005 is about 3318.2834417813. The cubic root of 11011005 is about 222.4721507037.

Adding to 11011005 its reverse (50011011), we get a palindrome (61022016).

The spelling of 11011005 in words is "eleven million, eleven thousand, five".