11012200020 has 48 divisors (see below), whose sum is σ = 34260179520. Its totient is φ = 2936586528.

The previous prime is 11012199971. The next prime is 11012200021. The reversal of 11012200020 is 2000221011.

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

It is a junction number, because it is equal to n+sod(n) for n = 11012199975 and 11012200011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11012200021) 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 15 ways as a sum of consecutive naturals, for example, 10195942 + ... + 10197021.

It is an arithmetic number, because the mean of its divisors is an integer number (713753740).

Almost surely, 2^11012200020 is an apocalyptic number.

11012200020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11012200020 is an abundant number, since it is smaller than the sum of its proper divisors (23247979500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11012200020 is a wasteful number, since it uses less digits than its factorization.

11012200020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20392981 (or 20392973 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 11012200020 its reverse (2000221011), we get a palindrome (13012421031).

The spelling of 11012200020 in words is "eleven billion, twelve million, two hundred thousand, twenty".