11161081 has 2 divisors, whose sum is σ = 11161082. Its totient is φ = 11161080.

The previous prime is 11161057. The next prime is 11161091. The reversal of 11161081 is 18016111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10949481 + 211600 = 3309^2 + 460^2 .

It is a cyclic number.

It is not a de Polignac number, because 11161081 - 2⁷ = 11160953 is a prime.

It is a super-2 number, since 2×11161081² = 249139458177122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11161001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5580540 + 5580541.

It is an arithmetic number, because the mean of its divisors is an integer number (5580541).

Almost surely, 2^11161081 is an apocalyptic number.

It is an amenable number.

11161081 is a deficient number, since it is larger than the sum of its proper divisors (1).

11161081 is an equidigital number, since it uses as much as digits as its factorization.

11161081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 19.

The square root of 11161081 is about 3340.8204082231. The cubic root of 11161081 is about 223.4783313744.

Adding to 11161081 its reverse (18016111), we get a palindrome (29177192).

It can be divided in two parts, 1116 and 1081, that added together give a cube (2197 = 13³).

The spelling of 11161081 in words is "eleven million, one hundred sixty-one thousand, eighty-one".