21003233333 has 2 divisors, whose sum is σ = 21003233334. Its totient is φ = 21003233332.

The previous prime is 21003233263. The next prime is 21003233359. The reversal of 21003233333 is 33333230012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20891233444 + 111999889 = 144538^2 + 10583^2 .

It is a cyclic number.

It is not a de Polignac number, because 21003233333 - 2¹⁸ = 21002971189 is a prime.

It is a super-2 number, since 2×21003233333² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21003233299 and 21003233308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21003233393) 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, 10501616666 + 10501616667.

It is an arithmetic number, because the mean of its divisors is an integer number (10501616667).

Almost surely, 2^21003233333 is an apocalyptic number.

It is an amenable number.

21003233333 is a deficient number, since it is larger than the sum of its proper divisors (1).

21003233333 is an equidigital number, since it uses as much as digits as its factorization.

21003233333 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 23.

Adding to 21003233333 its reverse (33333230012), we get a palindrome (54336463345).

The spelling of 21003233333 in words is "twenty-one billion, three million, two hundred thirty-three thousand, three hundred thirty-three".