33231312221 has 8 divisors (see below), whose sum is σ = 33705460800. Its totient is φ = 32757333280.

The previous prime is 33231312211. The next prime is 33231312253. The reversal of 33231312221 is 12221313233.

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 33231312221 - 2¹⁸ = 33231050077 is a prime.

It is a super-2 number, since 2×33231312221² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33231312211) 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 7 ways as a sum of consecutive naturals, for example, 382265 + ... + 461073.

It is an arithmetic number, because the mean of its divisors is an integer number (4213182600).

Almost surely, 2^33231312221 is an apocalyptic number.

It is an amenable number.

33231312221 is a deficient number, since it is larger than the sum of its proper divisors (474148579).

33231312221 is an equidigital number, since it uses as much as digits as its factorization.

33231312221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84819.

The product of its digits is 1296, while the sum is 23.

Adding to 33231312221 its reverse (12221313233), we get a palindrome (45452625454).

The spelling of 33231312221 in words is "thirty-three billion, two hundred thirty-one million, three hundred twelve thousand, two hundred twenty-one".