33024021221 has 2 divisors, whose sum is σ = 33024021222. Its totient is φ = 33024021220.

The previous prime is 33024021169. The next prime is 33024021223. The reversal of 33024021221 is 12212042033.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32621416996 + 402604225 = 180614^2 + 20065^2 .

It is a cyclic number.

It is not a de Polignac number, because 33024021221 - 2¹⁴ = 33024004837 is a prime.

Together with 33024021223, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 33024021193 and 33024021202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33024021223) 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, 16512010610 + 16512010611.

It is an arithmetic number, because the mean of its divisors is an integer number (16512010611).

Almost surely, 2^33024021221 is an apocalyptic number.

It is an amenable number.

33024021221 is a deficient number, since it is larger than the sum of its proper divisors (1).

33024021221 is an equidigital number, since it uses as much as digits as its factorization.

33024021221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 33024021221 its reverse (12212042033), we get a palindrome (45236063254).

The spelling of 33024021221 in words is "thirty-three billion, twenty-four million, twenty-one thousand, two hundred twenty-one".