21000000210011 has 2 divisors, whose sum is σ = 21000000210012. Its totient is φ = 21000000210010.

The previous prime is 21000000209989. The next prime is 21000000210037. The reversal of 21000000210011 is 11001200000012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21000000210011 - 2¹⁰ = 21000000208987 is a prime.

It is not a weakly prime, because it can be changed into another prime (21000000210061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500000105005 + 10500000105006.

It is an arithmetic number, because the mean of its divisors is an integer number (10500000105006).

Almost surely, 2^{21000000210011} is an apocalyptic number.

21000000210011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000000210011 is an equidigital number, since it uses as much as digits as its factorization.

21000000210011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 21000000210011 its reverse (11001200000012), we get a palindrome (32001200210023).

The spelling of 21000000210011 in words is "twenty-one trillion, two hundred ten thousand, eleven".