2002112221 has 2 divisors, whose sum is σ = 2002112222. Its totient is φ = 2002112220.

The previous prime is 2002112209. The next prime is 2002112239. The reversal of 2002112221 is 1222112002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1425440025 + 576672196 = 37755^2 + 24014^2 .

It is a cyclic number.

It is not a de Polignac number, because 2002112221 - 2¹⁹ = 2001587933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2002112261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001056110 + 1001056111.

It is an arithmetic number, because the mean of its divisors is an integer number (1001056111).

Almost surely, 2^2002112221 is an apocalyptic number.

It is an amenable number.

2002112221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2002112221 is an equidigital number, since it uses as much as digits as its factorization.

2002112221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2002112221 is about 44744.9686668792. The cubic root of 2002112221 is about 1260.3644324611.

Adding to 2002112221 its reverse (1222112002), we get a palindrome (3224224223).

The spelling of 2002112221 in words is "two billion, two million, one hundred twelve thousand, two hundred twenty-one".