2211200022221 has 4 divisors (see below), whose sum is σ = 2239189896000. Its totient is φ = 2183210148444.

The previous prime is 2211200022193. The next prime is 2211200022257. The reversal of 2211200022221 is 1222200021122.

It is a happy number.

2211200022221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2211200022221 - 2¹⁴ = 2211200005837 is a prime.

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 2211200022221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211200022121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13994936771 + ... + 13994936928.

It is an arithmetic number, because the mean of its divisors is an integer number (559797474000).

Almost surely, 2^{2211200022221} is an apocalyptic number.

It is an amenable number.

2211200022221 is a deficient number, since it is larger than the sum of its proper divisors (27989873779).

2211200022221 is an equidigital number, since it uses as much as digits as its factorization.

2211200022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27989873778.

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

Adding to 2211200022221 its reverse (1222200021122), we get a palindrome (3433400043343).

The spelling of 2211200022221 in words is "two trillion, two hundred eleven billion, two hundred million, twenty-two thousand, two hundred twenty-one".