33012045221 has 4 divisors (see below), whose sum is σ = 34953930252. Its totient is φ = 31070160192.

The previous prime is 33012045163. The next prime is 33012045229. The reversal of 33012045221 is 12254021033.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12254021033 = 137 ⋅89445409.

It can be written as a sum of positive squares in 2 ways, for example, as 24365649025 + 8646396196 = 156095^2 + 92986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33012045221 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 (33012045229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 970942490 + ... + 970942523.

It is an arithmetic number, because the mean of its divisors is an integer number (8738482563).

Almost surely, 2^33012045221 is an apocalyptic number.

It is an amenable number.

33012045221 is a deficient number, since it is larger than the sum of its proper divisors (1941885031).

33012045221 is a wasteful number, since it uses less digits than its factorization.

33012045221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1941885030.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 33012045221 its reverse (12254021033), we get a palindrome (45266066254).

The spelling of 33012045221 in words is "thirty-three billion, twelve million, forty-five thousand, two hundred twenty-one".