21103300033 has 2 divisors, whose sum is σ = 21103300034. Its totient is φ = 21103300032.

The previous prime is 21103299991. The next prime is 21103300061. The reversal of 21103300033 is 33000330112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20653138944 + 450161089 = 143712^2 + 21217^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21103300033 is a prime.

It is not a weakly prime, because it can be changed into another prime (21103300063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551650016 + 10551650017.

It is an arithmetic number, because the mean of its divisors is an integer number (10551650017).

Almost surely, 2^21103300033 is an apocalyptic number.

It is an amenable number.

21103300033 is a deficient number, since it is larger than the sum of its proper divisors (1).

21103300033 is an equidigital number, since it uses as much as digits as its factorization.

21103300033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 16.

Adding to 21103300033 its reverse (33000330112), we get a palindrome (54103630145).

The spelling of 21103300033 in words is "twenty-one billion, one hundred three million, three hundred thousand, thirty-three".