11200121021 has 4 divisors (see below), whose sum is σ = 11200342944. Its totient is φ = 11199899100.

The previous prime is 11200120991. The next prime is 11200121027. The reversal of 11200121021 is 12012100211.

11200121021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 11200121021 - 2²² = 11195926717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11200120993 and 11200121011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11200121027) 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 3 ways as a sum of consecutive naturals, for example, 5456 + ... + 149766.

It is an arithmetic number, because the mean of its divisors is an integer number (2800085736).

Almost surely, 2^11200121021 is an apocalyptic number.

It is an amenable number.

11200121021 is a deficient number, since it is larger than the sum of its proper divisors (221923).

11200121021 is an equidigital number, since it uses as much as digits as its factorization.

11200121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221922.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 11200121021 its reverse (12012100211), we get a palindrome (23212221232).

The spelling of 11200121021 in words is "eleven billion, two hundred million, one hundred twenty-one thousand, twenty-one".