33233031221 has 8 divisors (see below), whose sum is σ = 36756700344. Its totient is φ = 29847545280.

The previous prime is 33233031211. The next prime is 33233031241. The reversal of 33233031221 is 12213033233.

It can be written as a sum of positive squares in 4 ways, for example, as 9552130225 + 23680900996 = 97735^2 + 153886^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 33233031221 - 2³⁰ = 32159289397 is a prime.

It is a super-2 number, since 2×33233031221² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33233031211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34545290 + ... + 34546251.

It is an arithmetic number, because the mean of its divisors is an integer number (4594587543).

Almost surely, 2^33233031221 is an apocalyptic number.

It is an amenable number.

33233031221 is a deficient number, since it is larger than the sum of its proper divisors (3523669123).

33233031221 is a wasteful number, since it uses less digits than its factorization.

33233031221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69091591.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 33233031221 its reverse (12213033233), we get a palindrome (45446064454).

The spelling of 33233031221 in words is "thirty-three billion, two hundred thirty-three million, thirty-one thousand, two hundred twenty-one".