11121101 has 4 divisors (see below), whose sum is σ = 11128572. Its totient is φ = 11113632.

The previous prime is 11121083. The next prime is 11121139. The reversal of 11121101 is 10112111.

It is a happy number.

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.

It can be written as a sum of positive squares in 2 ways, for example, as 2992900 + 8128201 = 1730^2 + 2851^2 .

It is a cyclic number.

It is not a de Polignac number, because 11121101 - 2⁶ = 11121037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121601) 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, 656 + ... + 4761.

It is an arithmetic number, because the mean of its divisors is an integer number (2782143).

Almost surely, 2^11121101 is an apocalyptic number.

It is an amenable number.

11121101 is a deficient number, since it is larger than the sum of its proper divisors (7471).

11121101 is an equidigital number, since it uses as much as digits as its factorization.

11121101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7470.

The product of its (nonzero) digits is 2, while the sum is 8.

The square root of 11121101 is about 3334.8314800002. The cubic root of 11121101 is about 223.2111722696.

Adding to 11121101 its reverse (10112111), we get a palindrome (21233212).

It can be divided in two parts, 1112110 and 1, that added together give a palindrome (1112111).

The spelling of 11121101 in words is "eleven million, one hundred twenty-one thousand, one hundred one".