11081881 has 4 divisors (see below), whose sum is σ = 11150032. Its totient is φ = 11013732.

The previous prime is 11081879. The next prime is 11081887. The reversal of 11081881 is 18818011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18818011 = 1049 ⋅17939.

It is a cyclic number.

It is not a de Polignac number, because 11081881 - 2¹ = 11081879 is a prime.

It is a super-2 number, since 2×11081881² = 245616172996322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11081887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33831 + ... + 34156.

It is an arithmetic number, because the mean of its divisors is an integer number (2787508).

Almost surely, 2^11081881 is an apocalyptic number.

It is an amenable number.

11081881 is a deficient number, since it is larger than the sum of its proper divisors (68151).

11081881 is an equidigital number, since it uses as much as digits as its factorization.

11081881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68150.

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

The square root of 11081881 is about 3328.9459292695. The cubic root of 11081881 is about 222.9484688588.

Adding to 11081881 its reverse (18818011), we get a palindrome (29899892).

The spelling of 11081881 in words is "eleven million, eighty-one thousand, eight hundred eighty-one".