33112021000021 has 2 divisors, whose sum is σ = 33112021000022. Its totient is φ = 33112021000020.

The previous prime is 33112021000007. The next prime is 33112021000033. The reversal of 33112021000021 is 12000012021133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20833619556996 + 12278401443025 = 4564386^2 + 3504055^2 .

It is an emirp because it is prime and its reverse (12000012021133) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 33112021000021 - 2¹¹ = 33112020997973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 33112020999959 and 33112021000004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33112021000321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16556010500010 + 16556010500011.

It is an arithmetic number, because the mean of its divisors is an integer number (16556010500011).

Almost surely, 2^{33112021000021} is an apocalyptic number.

It is an amenable number.

33112021000021 is a deficient number, since it is larger than the sum of its proper divisors (1).

33112021000021 is an equidigital number, since it uses as much as digits as its factorization.

33112021000021 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 16.

Adding to 33112021000021 its reverse (12000012021133), we get a palindrome (45112033021154).

The spelling of 33112021000021 in words is "thirty-three trillion, one hundred twelve billion, twenty-one million, twenty-one", and thus it is an aban number.