2220210221 has 2 divisors, whose sum is σ = 2220210222. Its totient is φ = 2220210220.

The previous prime is 2220210191. The next prime is 2220210241. The reversal of 2220210221 is 1220120222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2210034121 + 10176100 = 47011^2 + 3190^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2220210221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2220210196 and 2220210205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2220210241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110105110 + 1110105111.

It is an arithmetic number, because the mean of its divisors is an integer number (1110105111).

Almost surely, 2^2220210221 is an apocalyptic number.

It is an amenable number.

2220210221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2220210221 is an equidigital number, since it uses as much as digits as its factorization.

2220210221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 2220210221 is about 47119.1067508712. The cubic root of 2220210221 is about 1304.5619255461.

Adding to 2220210221 its reverse (1220120222), we get a palindrome (3440330443).

It can be divided in two parts, 22202 and 10221, that added together give a palindrome (32423).

The spelling of 2220210221 in words is "two billion, two hundred twenty million, two hundred ten thousand, two hundred twenty-one".