2222201100221 has 4 divisors (see below), whose sum is σ = 2245110390012. Its totient is φ = 2199291810432.

The previous prime is 2222201100181. The next prime is 2222201100257. The reversal of 2222201100221 is 1220011022222.

It is a happy number.

2222201100221 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.

It can be written as a sum of positive squares in 2 ways, for example, as 1283947336996 + 938253763225 = 1133114^2 + 968635^2 .

It is a cyclic number.

It is not a de Polignac number, because 2222201100221 - 2³⁴ = 2205021231037 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 2222201100221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2222201100121) 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, 11454644750 + ... + 11454644943.

It is an arithmetic number, because the mean of its divisors is an integer number (561277597503).

Almost surely, 2^{2222201100221} is an apocalyptic number.

It is an amenable number.

2222201100221 is a deficient number, since it is larger than the sum of its proper divisors (22909289791).

2222201100221 is an equidigital number, since it uses as much as digits as its factorization.

2222201100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22909289790.

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

Adding to 2222201100221 its reverse (1220011022222), we get a palindrome (3442212122443).

The spelling of 2222201100221 in words is "two trillion, two hundred twenty-two billion, two hundred one million, one hundred thousand, two hundred twenty-one".