321120131329 has 2 divisors, whose sum is σ = 321120131330. Its totient is φ = 321120131328.

The previous prime is 321120131309. The next prime is 321120131351. The reversal of 321120131329 is 923131021123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 254442562929 + 66677568400 = 504423^2 + 258220^2 .

It is a cyclic number.

It is not a de Polignac number, because 321120131329 - 2¹⁹ = 321119607041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321120131297 and 321120131306.

It is not a weakly prime, because it can be changed into another prime (321120131309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160560065664 + 160560065665.

It is an arithmetic number, because the mean of its divisors is an integer number (160560065665).

Almost surely, 2^321120131329 is an apocalyptic number.

It is an amenable number.

321120131329 is a deficient number, since it is larger than the sum of its proper divisors (1).

321120131329 is an equidigital number, since it uses as much as digits as its factorization.

321120131329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

The spelling of 321120131329 in words is "three hundred twenty-one billion, one hundred twenty million, one hundred thirty-one thousand, three hundred twenty-nine".