331121212313321 has 2 divisors, whose sum is σ = 331121212313322. Its totient is φ = 331121212313320.

The previous prime is 331121212313183. The next prime is 331121212313393. The reversal of 331121212313321 is 123313212121133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 261212215767721 + 69908996545600 = 16162061^2 + 8361160^2 .

It is a cyclic number.

It is not a de Polignac number, because 331121212313321 - 2²² = 331121208119017 is a prime.

It is not a weakly prime, because it can be changed into another prime (331121212913321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165560606156660 + 165560606156661.

It is an arithmetic number, because the mean of its divisors is an integer number (165560606156661).

Almost surely, 2^{331121212313321} is an apocalyptic number.

It is an amenable number.

331121212313321 is a deficient number, since it is larger than the sum of its proper divisors (1).

331121212313321 is an equidigital number, since it uses as much as digits as its factorization.

331121212313321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 29.

Adding to 331121212313321 its reverse (123313212121133), we get a palindrome (454434424434454).

The spelling of 331121212313321 in words is "three hundred thirty-one trillion, one hundred twenty-one billion, two hundred twelve million, three hundred thirteen thousand, three hundred twenty-one".