11001121 has 12 divisors (see below), whose sum is σ = 11594752.
Its totient is φ = 10435824.
The previous prime is 11001103. The next prime is 11001131. The reversal of 11001121 is 12110011.
It is not a de Polignac number, because 11001121 - 27 = 11000993 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (11001131) 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 in 11 ways as a sum of consecutive naturals, for example, 86560 + ... + 86686.
Almost surely, 211001121 is an apocalyptic number.
It is an amenable number.
11001121 is a deficient number, since it is larger than the sum of its proper divisors (593631).
11001121 is a wasteful number, since it uses less digits than its factorization.
11001121 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 288 (or 259 counting only the distinct ones).
The product of its (nonzero) digits is 2, while the sum is 7.
The square root of 11001121 is about 3316.7937831587.
The cubic root of 11001121 is about 222.4055635933.
Adding to 11001121 its reverse (12110011), we get a palindrome (23111132).
Multiplying 11001121 by its reverse (12110011), we get a palindrome (133223696322331).
The spelling of 11001121 in words is "eleven million, one thousand, one hundred twenty-one".