2211120221 has 2 divisors, whose sum is σ = 2211120222. Its totient is φ = 2211120220.

The previous prime is 2211120209. The next prime is 2211120227. The reversal of 2211120221 is 1220211122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1839208996 + 371911225 = 42886^2 + 19285^2 .

It is a cyclic number.

It is not a de Polignac number, because 2211120221 - 2³⁰ = 1137378397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2211120196 and 2211120205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2211120227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105560110 + 1105560111.

It is an arithmetic number, because the mean of its divisors is an integer number (1105560111).

Almost surely, 2^2211120221 is an apocalyptic number.

It is an amenable number.

2211120221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211120221 is an equidigital number, since it uses as much as digits as its factorization.

2211120221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 2211120221 is about 47022.5501328884. The cubic root of 2211120221 is about 1302.7791081090.

Adding to 2211120221 its reverse (1220211122), we get a palindrome (3431331343).

Subtracting from 2211120221 its reverse (1220211122), we obtain a palindrome (990909099).

The spelling of 2211120221 in words is "two billion, two hundred eleven million, one hundred twenty thousand, two hundred twenty-one".