11151121 has 4 divisors (see below), whose sum is σ = 11160100. Its totient is φ = 11142144.

The previous prime is 11151073. The next prime is 11151131. The reversal of 11151121 is 12115111.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12115111 = 53 ⋅228587.

It can be written as a sum of positive squares in 2 ways, for example, as 3920400 + 7230721 = 1980^2 + 2689^2 .

It is a cyclic number.

It is not a de Polignac number, because 11151121 - 2¹⁷ = 11020049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11151131) 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, 2256 + ... + 5233.

It is an arithmetic number, because the mean of its divisors is an integer number (2790025).

Almost surely, 2^11151121 is an apocalyptic number.

It is an amenable number.

11151121 is a deficient number, since it is larger than the sum of its proper divisors (8979).

11151121 is an equidigital number, since it uses as much as digits as its factorization.

11151121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8978.

The product of its digits is 10, while the sum is 13.

The square root of 11151121 is about 3339.3294237017. The cubic root of 11151121 is about 223.4118352284.

Adding to 11151121 its reverse (12115111), we get a palindrome (23266232).

The spelling of 11151121 in words is "eleven million, one hundred fifty-one thousand, one hundred twenty-one".