2032221221 has 2 divisors, whose sum is σ = 2032221222. Its totient is φ = 2032221220.

The previous prime is 2032221199. The next prime is 2032221223. The reversal of 2032221221 is 1221222302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1979004196 + 53217025 = 44486^2 + 7295^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2032221221 is a prime.

It is a Sophie Germain prime.

Together with 2032221223, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2032221221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2032221223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1016110610 + 1016110611.

It is an arithmetic number, because the mean of its divisors is an integer number (1016110611).

Almost surely, 2^2032221221 is an apocalyptic number.

It is an amenable number.

2032221221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2032221221 is an equidigital number, since it uses as much as digits as its factorization.

2032221221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2032221221 is about 45080.1643852371. The cubic root of 2032221221 is about 1266.6510691139.

Adding to 2032221221 its reverse (1221222302), we get a palindrome (3253443523).

The spelling of 2032221221 in words is "two billion, thirty-two million, two hundred twenty-one thousand, two hundred twenty-one".