33024042431221 has 4 divisors (see below), whose sum is σ = 33024061277452. Its totient is φ = 33024023584992.

The previous prime is 33024042431197. The next prime is 33024042431243. The reversal of 33024042431221 is 12213424042033.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25199496408100 + 7824546023121 = 5019910^2 + 2797239^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33024042431221 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 (33024042438221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6490446 + ... + 10400671.

It is an arithmetic number, because the mean of its divisors is an integer number (8256015319363).

Almost surely, 2^{33024042431221} is an apocalyptic number.

It is an amenable number.

33024042431221 is a deficient number, since it is larger than the sum of its proper divisors (18846231).

33024042431221 is a wasteful number, since it uses less digits than its factorization.

33024042431221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18846230.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 33024042431221 its reverse (12213424042033), we get a palindrome (45237466473254).

The spelling of 33024042431221 in words is "thirty-three trillion, twenty-four billion, forty-two million, four hundred thirty-one thousand, two hundred twenty-one".