331201330320121 has 2 divisors, whose sum is σ = 331201330320122. Its totient is φ = 331201330320120.

The previous prime is 331201330320097. The next prime is 331201330320163. The reversal of 331201330320121 is 121023033102133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 329971584614400 + 1229745705721 = 18165120^2 + 1108939^2 .

It is a cyclic number.

It is not a de Polignac number, because 331201330320121 - 2⁵ = 331201330320089 is a prime.

It is not a weakly prime, because it can be changed into another prime (331201330324121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165600665160060 + 165600665160061.

It is an arithmetic number, because the mean of its divisors is an integer number (165600665160061).

Almost surely, 2^{331201330320121} is an apocalyptic number.

It is an amenable number.

331201330320121 is a deficient number, since it is larger than the sum of its proper divisors (1).

331201330320121 is an equidigital number, since it uses as much as digits as its factorization.

331201330320121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 331201330320121 its reverse (121023033102133), we get a palindrome (452224363422254).

The spelling of 331201330320121 in words is "three hundred thirty-one trillion, two hundred one billion, three hundred thirty million, three hundred twenty thousand, one hundred twenty-one".