11011100220 has 72 divisors (see below), whose sum is σ = 34215002640.
Its totient is φ = 2864674560.
The previous prime is 11011100207. The next prime is 11011100227. The reversal of 11011100220 is 2200111011.
Adding to 11011100220 its reverse (2200111011), we get a palindrome (13211211231).
It is a happy number.
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 (11011100227) by changing a digit.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 738630 + ... + 753389.
It is an arithmetic number, because the mean of its divisors is an integer number (475208370).
Almost surely, 211011100220 is an apocalyptic number.
11011100220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
11011100220 is an abundant number, since it is smaller than the sum of its proper divisors (23203902420).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
11011100220 is a wasteful number, since it uses less digits than its factorization.
11011100220 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1492075 (or 1492070 counting only the distinct ones).
The product of its (nonzero) digits is 4, while the sum is 9.
The spelling of 11011100220 in words is "eleven billion, eleven million, one hundred thousand, two hundred twenty".