11221101 has 24 divisors (see below), whose sum is σ = 17199104.
Its totient is φ = 7037280.
The previous prime is 11221097. The next prime is 11221103. The reversal of 11221101 is 10112211.
It is a happy number.
It is not a de Polignac number, because 11221101 - 22 = 11221097 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (9).
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (11221103) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9780 + ... + 10866.
Almost surely, 211221101 is an apocalyptic number.
It is an amenable number.
11221101 is a deficient number, since it is larger than the sum of its proper divisors (5978003).
11221101 is a wasteful number, since it uses less digits than its factorization.
11221101 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1161 (or 1158 counting only the distinct ones).
The product of its (nonzero) digits is 4, while the sum is 9.
The square root of 11221101 is about 3349.7911875220.
The cubic root of 11221101 is about 223.8782089311.
Adding to 11221101 its reverse (10112211), we get a palindrome (21333312).
The spelling of 11221101 in words is "eleven million, two hundred twenty-one thousand, one hundred one".