11211000221 has 4 divisors (see below), whose sum is σ = 11315776032. Its totient is φ = 11106224412.

The previous prime is 11211000209. The next prime is 11211000253. The reversal of 11211000221 is 12200011211.

11211000221 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 a de Polignac number, because none of the positive numbers 2^k-11211000221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211000821) 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, 52387745 + ... + 52387958.

It is an arithmetic number, because the mean of its divisors is an integer number (2828944008).

Almost surely, 2^11211000221 is an apocalyptic number.

It is an amenable number.

11211000221 is a deficient number, since it is larger than the sum of its proper divisors (104775811).

11211000221 is a wasteful number, since it uses less digits than its factorization.

11211000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104775810.

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

Adding to 11211000221 its reverse (12200011211), we get a palindrome (23411011432).

The spelling of 11211000221 in words is "eleven billion, two hundred eleven million, two hundred twenty-one", and thus it is an aban number.