2211200021220 has 24 divisors (see below), whose sum is σ = 6191360059584. Its totient is φ = 589653338976.

The previous prime is 2211200021209. The next prime is 2211200021227. The reversal of 2211200021220 is 221200021122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2211200021220.

It is not an unprimeable number, because it can be changed into a prime (2211200021227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18426666784 + ... + 18426666903.

It is an arithmetic number, because the mean of its divisors is an integer number (257973335816).

Almost surely, 2^{2211200021220} is an apocalyptic number.

2211200021220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2211200021220 is an abundant number, since it is smaller than the sum of its proper divisors (3980160038364).

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

2211200021220 is a wasteful number, since it uses less digits than its factorization.

2211200021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36853333699 (or 36853333697 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2211200021220 its reverse (221200021122), we get a palindrome (2432400042342).

The spelling of 2211200021220 in words is "two trillion, two hundred eleven billion, two hundred million, twenty-one thousand, two hundred twenty".