331332131321 has 4 divisors (see below), whose sum is σ = 331340333412. Its totient is φ = 331323929232.

The previous prime is 331332131311. The next prime is 331332131357. The reversal of 331332131321 is 123131233133.

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 204542725696 + 126789405625 = 452264^2 + 356075^2 .

It is a cyclic number.

It is not a de Polignac number, because 331332131321 - 2¹⁴ = 331332114937 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 (331332131311) 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, 4040150 + ... + 4121343.

It is an arithmetic number, because the mean of its divisors is an integer number (82835083353).

Almost surely, 2^331332131321 is an apocalyptic number.

It is an amenable number.

331332131321 is a deficient number, since it is larger than the sum of its proper divisors (8202091).

331332131321 is an equidigital number, since it uses as much as digits as its factorization.

331332131321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8202090.

The product of its digits is 2916, while the sum is 26.

Adding to 331332131321 its reverse (123131233133), we get a palindrome (454463364454).

The spelling of 331332131321 in words is "three hundred thirty-one billion, three hundred thirty-two million, one hundred thirty-one thousand, three hundred twenty-one".