33112110221 has 4 divisors (see below), whose sum is σ = 33511051392. Its totient is φ = 32713169052.

The previous prime is 33112110193. The next prime is 33112110253. The reversal of 33112110221 is 12201121133.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12201121133 = 7699 ⋅1584767.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33112110221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 33112110221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33112110271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199470461 + ... + 199470626.

It is an arithmetic number, because the mean of its divisors is an integer number (8377762848).

Almost surely, 2^33112110221 is an apocalyptic number.

It is an amenable number.

33112110221 is a deficient number, since it is larger than the sum of its proper divisors (398941171).

33112110221 is an equidigital number, since it uses as much as digits as its factorization.

33112110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398941170.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 33112110221 its reverse (12201121133), we get a palindrome (45313231354).

The spelling of 33112110221 in words is "thirty-three billion, one hundred twelve million, one hundred ten thousand, two hundred twenty-one".