33021213113221 has 4 divisors (see below), whose sum is σ = 33514067040352. Its totient is φ = 32528359186092.

The previous prime is 33021213113177. The next prime is 33021213113261. The reversal of 33021213113221 is 12231131212033.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 33021213113221 - 2³¹ = 33019065629573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33021213113261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246426963465 + ... + 246426963598.

It is an arithmetic number, because the mean of its divisors is an integer number (8378516760088).

Almost surely, 2^{33021213113221} is an apocalyptic number.

It is an amenable number.

33021213113221 is a deficient number, since it is larger than the sum of its proper divisors (492853927131).

33021213113221 is an equidigital number, since it uses as much as digits as its factorization.

33021213113221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492853927130.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 33021213113221 its reverse (12231131212033), we get a palindrome (45252344325254).

The spelling of 33021213113221 in words is "thirty-three trillion, twenty-one billion, two hundred thirteen million, one hundred thirteen thousand, two hundred twenty-one".