33541320221 has 8 divisors (see below), whose sum is σ = 35544209400. Its totient is φ = 31594850560.

The previous prime is 33541320203. The next prime is 33541320251. The reversal of 33541320221 is 12202314533.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1432622500 + 32108697721 = 37850^2 + 179189^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 33541320221 - 2⁶ = 33541320157 is a prime.

It is a super-2 number, since 2×33541320221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33541320251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14103656 + ... + 14106033.

It is an arithmetic number, because the mean of its divisors is an integer number (4443026175).

Almost surely, 2^33541320221 is an apocalyptic number.

It is an amenable number.

33541320221 is a deficient number, since it is larger than the sum of its proper divisors (2002889179).

33541320221 is a wasteful number, since it uses less digits than its factorization.

33541320221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28209759.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 33541320221 its reverse (12202314533), we get a palindrome (45743634754).

The spelling of 33541320221 in words is "thirty-three billion, five hundred forty-one million, three hundred twenty thousand, two hundred twenty-one".