33504042221 has 16 divisors (see below), whose sum is σ = 38219102208. Its totient is φ = 29095852800.

The previous prime is 33504042191. The next prime is 33504042223. The reversal of 33504042221 is 12224040533.

It is a cyclic number.

It is not a de Polignac number, because 33504042221 - 2²² = 33499847917 is a prime.

It is a super-2 number, since 2×33504042221² (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 (33504042223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 543356 + ... + 601866.

It is an arithmetic number, because the mean of its divisors is an integer number (2388693888).

Almost surely, 2^33504042221 is an apocalyptic number.

It is an amenable number.

33504042221 is a deficient number, since it is larger than the sum of its proper divisors (4715059987).

33504042221 is a wasteful number, since it uses less digits than its factorization.

33504042221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61132.

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 33504042221 its reverse (12224040533), we get a palindrome (45728082754).

The spelling of 33504042221 in words is "thirty-three billion, five hundred four million, forty-two thousand, two hundred twenty-one".