33404041221 has 4 divisors (see below), whose sum is σ = 44538721632. Its totient is φ = 22269360812.

The previous prime is 33404041201. The next prime is 33404041241. The reversal of 33404041221 is 12214040433.

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 an interprime number because it is at equal distance from previous prime (33404041201) and next prime (33404041241).

It is a cyclic number.

It is not a de Polignac number, because 33404041221 - 2⁶ = 33404041157 is a prime.

It is a super-2 number, since 2×33404041221² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33404041191 and 33404041200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33404041201) 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, 5567340201 + ... + 5567340206.

It is an arithmetic number, because the mean of its divisors is an integer number (11134680408).

Almost surely, 2^33404041221 is an apocalyptic number.

It is an amenable number.

33404041221 is a deficient number, since it is larger than the sum of its proper divisors (11134680411).

33404041221 is a wasteful number, since it uses less digits than its factorization.

33404041221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11134680410.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 33404041221 its reverse (12214040433), we get a palindrome (45618081654).

It can be divided in two parts, 334040412 and 21, that added together give a palindrome (334040433).

The spelling of 33404041221 in words is "thirty-three billion, four hundred four million, forty-one thousand, two hundred twenty-one".