331211121311321 has 4 divisors (see below), whose sum is σ = 340162773238692. Its totient is φ = 322259469383952.

The previous prime is 331211121311209. The next prime is 331211121311333. The reversal of 331211121311321 is 123113121112133.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 293773121115721 + 37438000195600 = 17139811^2 + 6118660^2 .

It is a cyclic number.

It is not a de Polignac number, because 331211121311321 - 2¹⁸ = 331211121049177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (331211121314321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4475825963630 + ... + 4475825963703.

It is an arithmetic number, because the mean of its divisors is an integer number (85040693309673).

Almost surely, 2^{331211121311321} is an apocalyptic number.

It is an amenable number.

331211121311321 is a deficient number, since it is larger than the sum of its proper divisors (8951651927371).

331211121311321 is an equidigital number, since it uses as much as digits as its factorization.

331211121311321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8951651927370.

The product of its digits is 648, while the sum is 26.

Adding to 331211121311321 its reverse (123113121112133), we get a palindrome (454324242423454).

The spelling of 331211121311321 in words is "three hundred thirty-one trillion, two hundred eleven billion, one hundred twenty-one million, three hundred eleven thousand, three hundred twenty-one".