2200021221221 has 16 divisors (see below), whose sum is σ = 2412409950720. Its totient is φ = 1997287165440.

The previous prime is 2200021221173. The next prime is 2200021221263. The reversal of 2200021221221 is 1221221200022.

It is a happy number.

It is not a de Polignac number, because 2200021221221 - 2⁶ = 2200021221157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2200021221221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2200021224221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6637256 + ... + 6960833.

It is an arithmetic number, because the mean of its divisors is an integer number (150775621920).

Almost surely, 2^{2200021221221} is an apocalyptic number.

It is an amenable number.

2200021221221 is a deficient number, since it is larger than the sum of its proper divisors (212388729499).

2200021221221 is a wasteful number, since it uses less digits than its factorization.

2200021221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13598444.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2200021221221 its reverse (1221221200022), we get a palindrome (3421242421243).

It can be divided in two parts, 2200021 and 221221, that added together give a palindrome (2421242).

The spelling of 2200021221221 in words is "two trillion, two hundred billion, twenty-one million, two hundred twenty-one thousand, two hundred twenty-one".