331221033021221 has 8 divisors (see below), whose sum is σ = 384954227240640. Its totient is φ = 279091814748768.

The previous prime is 331221033021091. The next prime is 331221033021239. The reversal of 331221033021221 is 122120330122133.

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

It is not a de Polignac number, because 331221033021221 - 2²⁶ = 331220965912357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331221033021251) 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, 400993986296 + ... + 400993987121.

It is an arithmetic number, because the mean of its divisors is an integer number (48119278405080).

Almost surely, 2^{331221033021221} is an apocalyptic number.

It is an amenable number.

331221033021221 is a deficient number, since it is larger than the sum of its proper divisors (53733194219419).

331221033021221 is an equidigital number, since it uses as much as digits as its factorization.

331221033021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801987973483.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 331221033021221 its reverse (122120330122133), we get a palindrome (453341363143354).

The spelling of 331221033021221 in words is "three hundred thirty-one trillion, two hundred twenty-one billion, thirty-three million, twenty-one thousand, two hundred twenty-one".