2110211221 has 2 divisors, whose sum is σ = 2110211222. Its totient is φ = 2110211220.

The previous prime is 2110211209. The next prime is 2110211227. The reversal of 2110211221 is 1221120112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1922822500 + 187388721 = 43850^2 + 13689^2 .

It is a cyclic number.

It is not a de Polignac number, because 2110211221 - 2⁵ = 2110211189 is a prime.

It is a super-3 number, since 3×2110211221³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2110211227) 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 as a sum of consecutive naturals, namely, 1055105610 + 1055105611.

It is an arithmetic number, because the mean of its divisors is an integer number (1055105611).

Almost surely, 2^2110211221 is an apocalyptic number.

It is an amenable number.

2110211221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2110211221 is an equidigital number, since it uses as much as digits as its factorization.

2110211221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 2110211221 is about 45937.0353962900. The cubic root of 2110211221 is about 1282.6514093567.

Adding to 2110211221 its reverse (1221120112), we get a palindrome (3331331333).

It can be divided in two parts, 21102 and 11221, that added together give a palindrome (32323).

The spelling of 2110211221 in words is "two billion, one hundred ten million, two hundred eleven thousand, two hundred twenty-one".