11123340221 has 16 divisors (see below), whose sum is σ = 13707845760. Its totient is φ = 8812177920.

The previous prime is 11123340209. The next prime is 11123340281. The reversal of 11123340221 is 12204332111.

11123340221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11123340221 - 2⁶ = 11123340157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11123340193 and 11123340202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11123340281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1014476 + ... + 1025381.

It is an arithmetic number, because the mean of its divisors is an integer number (856740360).

Almost surely, 2^11123340221 is an apocalyptic number.

It is an amenable number.

11123340221 is a deficient number, since it is larger than the sum of its proper divisors (2584505539).

11123340221 is a wasteful number, since it uses less digits than its factorization.

11123340221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2039924.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 11123340221 its reverse (12204332111), we get a palindrome (23327672332).

The spelling of 11123340221 in words is "eleven billion, one hundred twenty-three million, three hundred forty thousand, two hundred twenty-one".