21233017033 has 2 divisors, whose sum is σ = 21233017034. Its totient is φ = 21233017032.

The previous prime is 21233016947. The next prime is 21233017049. The reversal of 21233017033 is 33071033212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13756474944 + 7476542089 = 117288^2 + 86467^2 .

It is a cyclic number.

It is not a de Polignac number, because 21233017033 - 2⁹ = 21233016521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21233016989 and 21233017007.

It is not a weakly prime, because it can be changed into another prime (21233017073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616508516 + 10616508517.

It is an arithmetic number, because the mean of its divisors is an integer number (10616508517).

Almost surely, 2^21233017033 is an apocalyptic number.

It is an amenable number.

21233017033 is a deficient number, since it is larger than the sum of its proper divisors (1).

21233017033 is an equidigital number, since it uses as much as digits as its factorization.

21233017033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 25.

The spelling of 21233017033 in words is "twenty-one billion, two hundred thirty-three million, seventeen thousand, thirty-three".