11801081 has 4 divisors (see below), whose sum is σ = 11814564. Its totient is φ = 11787600.

The previous prime is 11801063. The next prime is 11801129. The reversal of 11801081 is 18010811.

11801081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8880400 + 2920681 = 2980^2 + 1709^2 .

It is a cyclic number.

It is not a de Polignac number, because 11801081 - 2⁶ = 11801017 is a prime.

It is a super-2 number, since 2×11801081² = 278531025537122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11801981) 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, 5330 + ... + 7211.

It is an arithmetic number, because the mean of its divisors is an integer number (2953641).

Almost surely, 2^11801081 is an apocalyptic number.

It is an amenable number.

11801081 is a deficient number, since it is larger than the sum of its proper divisors (13483).

11801081 is an equidigital number, since it uses as much as digits as its factorization.

11801081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13482.

The product of its (nonzero) digits is 64, while the sum is 20.

The square root of 11801081 is about 3435.2701494933. The cubic root of 11801081 is about 227.6707633908.

Adding to 11801081 its reverse (18010811), we get a palindrome (29811892).

The spelling of 11801081 in words is "eleven million, eight hundred one thousand, eighty-one".