21330203111011 has 2 divisors, whose sum is σ = 21330203111012. Its totient is φ = 21330203111010.

The previous prime is 21330203110991. The next prime is 21330203111059. The reversal of 21330203111011 is 11011130203312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21330203111011 - 2⁹ = 21330203110499 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21330203111011.

It is not a weakly prime, because it can be changed into another prime (21330203111111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10665101555505 + 10665101555506.

It is an arithmetic number, because the mean of its divisors is an integer number (10665101555506).

Almost surely, 2^{21330203111011} is an apocalyptic number.

21330203111011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21330203111011 is an equidigital number, since it uses as much as digits as its factorization.

21330203111011 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 19.

Adding to 21330203111011 its reverse (11011130203312), we get a palindrome (32341333314323).

The spelling of 21330203111011 in words is "twenty-one trillion, three hundred thirty billion, two hundred three million, one hundred eleven thousand, eleven".