11221001001 has 24 divisors (see below), whose sum is σ = 19162303680. Its totient is φ = 6190896096.

The previous prime is 11221000993. The next prime is 11221001017. The reversal of 11221001001 is 10010012211.

It is a happy number.

11221001001 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 11221001001 - 2³ = 11221000993 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (11221001021) 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 23 ways as a sum of consecutive naturals, for example, 3069055 + ... + 3072708.

It is an arithmetic number, because the mean of its divisors is an integer number (798429320).

Almost surely, 2^11221001001 is an apocalyptic number.

It is an amenable number.

11221001001 is a deficient number, since it is larger than the sum of its proper divisors (7941302679).

11221001001 is a wasteful number, since it uses less digits than its factorization.

11221001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6141805 (or 6141802 counting only the distinct ones).

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

Adding to 11221001001 its reverse (10010012211), we get a palindrome (21231013212).

The spelling of 11221001001 in words is "eleven billion, two hundred twenty-one million, one thousand, one".