33012200021 has 2 divisors, whose sum is σ = 33012200022. Its totient is φ = 33012200020.

The previous prime is 33012200017. The next prime is 33012200033. The reversal of 33012200021 is 12000221033.

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., 28930267921 + 4081932100 = 170089^2 + 63890^2 .

It is a cyclic number.

It is not a de Polignac number, because 33012200021 - 2² = 33012200017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 33012199969 and 33012200005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33012200071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16506100010 + 16506100011.

It is an arithmetic number, because the mean of its divisors is an integer number (16506100011).

Almost surely, 2^33012200021 is an apocalyptic number.

It is an amenable number.

33012200021 is a deficient number, since it is larger than the sum of its proper divisors (1).

33012200021 is an equidigital number, since it uses as much as digits as its factorization.

33012200021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 33012200021 its reverse (12000221033), we get a palindrome (45012421054).

The spelling of 33012200021 in words is "thirty-three billion, twelve million, two hundred thousand, twenty-one".