11218081 has 8 divisors (see below), whose sum is σ = 12864384. Its totient is φ = 9582720.

The previous prime is 11218073. The next prime is 11218093. The reversal of 11218081 is 18081211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11218081 - 2³ = 11218073 is a prime.

It is a super-2 number, since 2×11218081² = 251690682645122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11218381) 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 7 ways as a sum of consecutive naturals, for example, 400 + ... + 4753.

It is an arithmetic number, because the mean of its divisors is an integer number (1608048).

Almost surely, 2^11218081 is an apocalyptic number.

It is an amenable number.

11218081 is a deficient number, since it is larger than the sum of its proper divisors (1646303).

11218081 is an equidigital number, since it uses as much as digits as its factorization.

11218081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5471.

The product of its (nonzero) digits is 128, while the sum is 22.

The square root of 11218081 is about 3349.3403828217. The cubic root of 11218081 is about 223.8581225821.

Adding to 11218081 its reverse (18081211), we get a palindrome (29299292).

The spelling of 11218081 in words is "eleven million, two hundred eighteen thousand, eighty-one".