33481221011 has 16 divisors (see below), whose sum is σ = 38493109248. Its totient is φ = 28527033600.

The previous prime is 33481221001. The next prime is 33481221023. The reversal of 33481221011 is 11012218433.

It is a cyclic number.

It is not a de Polignac number, because 33481221011 - 2³⁰ = 32407479187 is a prime.

It is a super-2 number, since 2×33481221011² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33481221001) 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, 820451 + ... + 860291.

It is an arithmetic number, because the mean of its divisors is an integer number (2405819328).

Almost surely, 2^33481221011 is an apocalyptic number.

33481221011 is a deficient number, since it is larger than the sum of its proper divisors (5011888237).

33481221011 is a wasteful number, since it uses less digits than its factorization.

33481221011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40562.

The product of its (nonzero) digits is 1152, while the sum is 26.

Adding to 33481221011 its reverse (11012218433), we get a palindrome (44493439444).

The spelling of 33481221011 in words is "thirty-three billion, four hundred eighty-one million, two hundred twenty-one thousand, eleven".