11163121 has 2 divisors, whose sum is σ = 11163122. Its totient is φ = 11163120.

The previous prime is 11163107. The next prime is 11163149. The reversal of 11163121 is 12136111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11128896 + 34225 = 3336^2 + 185^2 .

It is a cyclic number.

It is not a de Polignac number, because 11163121 - 2⁷ = 11162993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11163095 and 11163104.

It is not a weakly prime, because it can be changed into another prime (11163221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5581560 + 5581561.

It is an arithmetic number, because the mean of its divisors is an integer number (5581561).

Almost surely, 2^11163121 is an apocalyptic number.

It is an amenable number.

11163121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11163121 is an equidigital number, since it uses as much as digits as its factorization.

11163121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36, while the sum is 16.

The square root of 11163121 is about 3341.1257085001. The cubic root of 11163121 is about 223.4919461853.

Adding to 11163121 its reverse (12136111), we get a palindrome (23299232).

The spelling of 11163121 in words is "eleven million, one hundred sixty-three thousand, one hundred twenty-one".