11145121 has 8 divisors (see below), whose sum is σ = 12029864. Its totient is φ = 10264320.

The previous prime is 11145109. The next prime is 11145137. The reversal of 11145121 is 12154111.

It can be written as a sum of positive squares in 4 ways, for example, as 4840000 + 6305121 = 2200^2 + 2511^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11145121 - 2¹¹ = 11143073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11145095 and 11145104.

It is not an unprimeable number, because it can be changed into a prime (11145161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7945 + ... + 9241.

It is an arithmetic number, because the mean of its divisors is an integer number (1503733).

Almost surely, 2^11145121 is an apocalyptic number.

It is an amenable number.

11145121 is a deficient number, since it is larger than the sum of its proper divisors (884743).

11145121 is a wasteful number, since it uses less digits than its factorization.

11145121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1971.

The product of its digits is 40, while the sum is 16.

The square root of 11145121 is about 3338.4309188599. The cubic root of 11145121 is about 223.3717581964.

Adding to 11145121 its reverse (12154111), we get a palindrome (23299232).

The spelling of 11145121 in words is "eleven million, one hundred forty-five thousand, one hundred twenty-one".