21030310211 has 2 divisors, whose sum is σ = 21030310212. Its totient is φ = 21030310210.

The previous prime is 21030310181. The next prime is 21030310237. The reversal of 21030310211 is 11201303012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21030310211 - 2¹⁴ = 21030293827 is a prime.

It is not a weakly prime, because it can be changed into another prime (21030310711) 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, 10515155105 + 10515155106.

It is an arithmetic number, because the mean of its divisors is an integer number (10515155106).

Almost surely, 2^21030310211 is an apocalyptic number.

21030310211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21030310211 is an equidigital number, since it uses as much as digits as its factorization.

21030310211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21030310211 its reverse (11201303012), we get a palindrome (32231613223).

The spelling of 21030310211 in words is "twenty-one billion, thirty million, three hundred ten thousand, two hundred eleven".