2203030021 has 2 divisors, whose sum is σ = 2203030022. Its totient is φ = 2203030020.

The previous prime is 2203030019. The next prime is 2203030117. The reversal of 2203030021 is 1200303022.

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., 1902180996 + 300849025 = 43614^2 + 17345^2 .

It is a cyclic number.

It is not a de Polignac number, because 2203030021 - 2¹ = 2203030019 is a prime.

Together with 2203030019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 2203029983 and 2203030010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2203030001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1101515010 + 1101515011.

It is an arithmetic number, because the mean of its divisors is an integer number (1101515011).

Almost surely, 2^2203030021 is an apocalyptic number.

It is an amenable number.

2203030021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2203030021 is an equidigital number, since it uses as much as digits as its factorization.

2203030021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 2203030021 is about 46936.4466166752. The cubic root of 2203030021 is about 1301.1882667866.

Adding to 2203030021 its reverse (1200303022), we get a palindrome (3403333043).

The spelling of 2203030021 in words is "two billion, two hundred three million, thirty thousand, twenty-one".