11121109 has 4 divisors (see below), whose sum is σ = 11129760. Its totient is φ = 11112460.

The previous prime is 11121083. The next prime is 11121139. The reversal of 11121109 is 90112111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11121109 - 2⁷ = 11120981 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11121092 and 11121101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121139) 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 3 ways as a sum of consecutive naturals, for example, 1969 + ... + 5110.

It is an arithmetic number, because the mean of its divisors is an integer number (2782440).

Almost surely, 2^11121109 is an apocalyptic number.

It is an amenable number.

11121109 is a deficient number, since it is larger than the sum of its proper divisors (8651).

11121109 is an equidigital number, since it uses as much as digits as its factorization.

11121109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8650.

The product of its (nonzero) digits is 18, while the sum is 16.

The square root of 11121109 is about 3334.8326794608. The cubic root of 11121109 is about 223.2112257921.

The spelling of 11121109 in words is "eleven million, one hundred twenty-one thousand, one hundred nine".