21022303033 has 2 divisors, whose sum is σ = 21022303034. Its totient is φ = 21022303032.

The previous prime is 21022303013. The next prime is 21022303063. The reversal of 21022303033 is 33030322012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12957724224 + 8064578809 = 113832^2 + 89803^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21022303033 is a prime.

It is a super-2 number, since 2×21022303033² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21022303033.

It is not a weakly prime, because it can be changed into another prime (21022303013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511151516 + 10511151517.

It is an arithmetic number, because the mean of its divisors is an integer number (10511151517).

Almost surely, 2^21022303033 is an apocalyptic number.

It is an amenable number.

21022303033 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022303033 is an equidigital number, since it uses as much as digits as its factorization.

21022303033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 19.

Adding to 21022303033 its reverse (33030322012), we get a palindrome (54052625045).

The spelling of 21022303033 in words is "twenty-one billion, twenty-two million, three hundred three thousand, thirty-three".