2211347221 has 4 divisors (see below), whose sum is σ = 2211451200. Its totient is φ = 2211243244.

The previous prime is 2211347219. The next prime is 2211347239. The reversal of 2211347221 is 1227431122.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2211347221 - 2¹ = 2211347219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211387221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7261 + ... + 66898.

It is an arithmetic number, because the mean of its divisors is an integer number (552862800).

Almost surely, 2^2211347221 is an apocalyptic number.

It is an amenable number.

2211347221 is a deficient number, since it is larger than the sum of its proper divisors (103979).

2211347221 is an equidigital number, since it uses as much as digits as its factorization.

2211347221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103978.

The product of its digits is 1344, while the sum is 25.

The square root of 2211347221 is about 47024.9638064720. The cubic root of 2211347221 is about 1302.8236889410.

Adding to 2211347221 its reverse (1227431122), we get a palindrome (3438778343).

The spelling of 2211347221 in words is "two billion, two hundred eleven million, three hundred forty-seven thousand, two hundred twenty-one".