211330300021 has 2 divisors, whose sum is σ = 211330300022. Its totient is φ = 211330300020.

The previous prime is 211330300009. The next prime is 211330300073. The reversal of 211330300021 is 120003033112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119211372900 + 92118927121 = 345270^2 + 303511^2 .

It is a cyclic number.

It is not a de Polignac number, because 211330300021 - 2⁷ = 211330299893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211330299968 and 211330300004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211330300081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105665150010 + 105665150011.

It is an arithmetic number, because the mean of its divisors is an integer number (105665150011).

Almost surely, 2^211330300021 is an apocalyptic number.

It is an amenable number.

211330300021 is a deficient number, since it is larger than the sum of its proper divisors (1).

211330300021 is an equidigital number, since it uses as much as digits as its factorization.

211330300021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 211330300021 its reverse (120003033112), we get a palindrome (331333333133).

The spelling of 211330300021 in words is "two hundred eleven billion, three hundred thirty million, three hundred thousand, twenty-one".