11188081 has 2 divisors, whose sum is σ = 11188082. Its totient is φ = 11188080.

The previous prime is 11188069. The next prime is 11188103. The reversal of 11188081 is 18088111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9511056 + 1677025 = 3084^2 + 1295^2 .

It is a cyclic number.

It is not a de Polignac number, because 11188081 - 2⁵ = 11188049 is a prime.

It is a super-2 number, since 2×11188081² = 250346312925122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11188381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5594040 + 5594041.

It is an arithmetic number, because the mean of its divisors is an integer number (5594041).

Almost surely, 2^11188081 is an apocalyptic number.

It is an amenable number.

11188081 is a deficient number, since it is larger than the sum of its proper divisors (1).

11188081 is an equidigital number, since it uses as much as digits as its factorization.

11188081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 28.

The square root of 11188081 is about 3344.8588908951. The cubic root of 11188081 is about 223.6583932605.

The spelling of 11188081 in words is "eleven million, one hundred eighty-eight thousand, eighty-one".