2010230821 has 2 divisors, whose sum is σ = 2010230822. Its totient is φ = 2010230820.

The previous prime is 2010230819. The next prime is 2010230851. The reversal of 2010230821 is 1280320102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1731808225 + 278422596 = 41615^2 + 16686^2 .

It is a cyclic number.

It is not a de Polignac number, because 2010230821 - 2¹ = 2010230819 is a prime.

Together with 2010230819, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2010230801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005115410 + 1005115411.

It is an arithmetic number, because the mean of its divisors is an integer number (1005115411).

Almost surely, 2^2010230821 is an apocalyptic number.

It is an amenable number.

2010230821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2010230821 is an equidigital number, since it uses as much as digits as its factorization.

2010230821 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 19.

The square root of 2010230821 is about 44835.5976987036. The cubic root of 2010230821 is about 1262.0657348493.

Adding to 2010230821 its reverse (1280320102), we get a palindrome (3290550923).

The spelling of 2010230821 in words is "two billion, ten million, two hundred thirty thousand, eight hundred twenty-one".