11011000221 has 32 divisors (see below), whose sum is σ = 17995904640. Its totient is φ = 6610723200.

The previous prime is 11011000219. The next prime is 11011000241. The reversal of 11011000221 is 12200011011.

It is a happy number.

It is not a de Polignac number, because 11011000221 - 2¹ = 11011000219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011000201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 368175 + ... + 396956.

It is an arithmetic number, because the mean of its divisors is an integer number (562372020).

Almost surely, 2^11011000221 is an apocalyptic number.

It is an amenable number.

11011000221 is a deficient number, since it is larger than the sum of its proper divisors (6984904419).

11011000221 is a wasteful number, since it uses less digits than its factorization.

11011000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765194 (or 765188 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 11011000221 its reverse (12200011011), we get a palindrome (23211011232).

The spelling of 11011000221 in words is "eleven billion, eleven million, two hundred twenty-one", and thus it is an aban number.