2211440221 has 2 divisors, whose sum is σ = 2211440222. Its totient is φ = 2211440220.

The previous prime is 2211440207. The next prime is 2211440233. The reversal of 2211440221 is 1220441122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2076624900 + 134815321 = 45570^2 + 11611^2 .

It is a cyclic number.

It is not a de Polignac number, because 2211440221 - 2⁷ = 2211440093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2211440251) 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 as a sum of consecutive naturals, namely, 1105720110 + 1105720111.

It is an arithmetic number, because the mean of its divisors is an integer number (1105720111).

Almost surely, 2^2211440221 is an apocalyptic number.

It is an amenable number.

2211440221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211440221 is an equidigital number, since it uses as much as digits as its factorization.

2211440221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 2211440221 is about 47025.9526325624. The cubic root of 2211440221 is about 1302.8419524538.

Adding to 2211440221 its reverse (1220441122), we get a palindrome (3431881343).

Subtracting from 2211440221 its reverse (1220441122), we obtain a palindrome (990999099).

The spelling of 2211440221 in words is "two billion, two hundred eleven million, four hundred forty thousand, two hundred twenty-one".