33040204112221 has 4 divisors (see below), whose sum is σ = 33052016844412. Its totient is φ = 33028391380032.

The previous prime is 33040204112219. The next prime is 33040204112257. The reversal of 33040204112221 is 12221140204033.

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 29272276668996 + 3767927443225 = 5410386^2 + 1941115^2 .

It is a cyclic number.

It is not a de Polignac number, because 33040204112221 - 2¹ = 33040204112219 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 (33040204112921) 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, 5906361900 + ... + 5906367493.

It is an arithmetic number, because the mean of its divisors is an integer number (8263004211103).

Almost surely, 2^{33040204112221} is an apocalyptic number.

It is an amenable number.

33040204112221 is a deficient number, since it is larger than the sum of its proper divisors (11812732191).

33040204112221 is a wasteful number, since it uses less digits than its factorization.

33040204112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11812732190.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 33040204112221 its reverse (12221140204033), we get a palindrome (45261344316254).

The spelling of 33040204112221 in words is "thirty-three trillion, forty billion, two hundred four million, one hundred twelve thousand, two hundred twenty-one".