331230212231221 has 16 divisors (see below), whose sum is σ = 343028244340800. Its totient is φ = 319457295380608.

The previous prime is 331230212231201. The next prime is 331230212231249. The reversal of 331230212231221 is 122132212032133.

It is a cyclic number.

It is not a de Polignac number, because 331230212231221 - 2¹¹ = 331230212229173 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 331230212231221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331230212231201) 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 15 ways as a sum of consecutive naturals, for example, 684218385 + ... + 684702313.

It is an arithmetic number, because the mean of its divisors is an integer number (21439265271300).

Almost surely, 2^{331230212231221} is an apocalyptic number.

It is an amenable number.

331230212231221 is a deficient number, since it is larger than the sum of its proper divisors (11798032109579).

331230212231221 is a wasteful number, since it uses less digits than its factorization.

331230212231221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509828.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 331230212231221 its reverse (122132212032133), we get a palindrome (453362424263354).

The spelling of 331230212231221 in words is "three hundred thirty-one trillion, two hundred thirty billion, two hundred twelve million, two hundred thirty-one thousand, two hundred twenty-one".