11331121 has 2 divisors, whose sum is σ = 11331122. Its totient is φ = 11331120.

The previous prime is 11331091. The next prime is 11331137. The reversal of 11331121 is 12113311.

11331121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5948721 + 5382400 = 2439^2 + 2320^2 .

It is a cyclic number.

It is not a de Polignac number, because 11331121 - 2⁹ = 11330609 is a prime.

It is not a weakly prime, because it can be changed into another prime (11331521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5665560 + 5665561.

It is an arithmetic number, because the mean of its divisors is an integer number (5665561).

Almost surely, 2^11331121 is an apocalyptic number.

It is an amenable number.

11331121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11331121 is an equidigital number, since it uses as much as digits as its factorization.

11331121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18, while the sum is 13.

The square root of 11331121 is about 3366.1730496218. The cubic root of 11331121 is about 224.6075198882.

Adding to 11331121 its reverse (12113311), we get a palindrome (23444432).

The spelling of 11331121 in words is "eleven million, three hundred thirty-one thousand, one hundred twenty-one".