321299008909 has 2 divisors, whose sum is σ = 321299008910. Its totient is φ = 321299008908.

The previous prime is 321299008871. The next prime is 321299008931. The reversal of 321299008909 is 909800992123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 285888049225 + 35410959684 = 534685^2 + 188178^2 .

It is a cyclic number.

It is not a de Polignac number, because 321299008909 - 2¹³ = 321299000717 is a prime.

It is a super-2 number, since 2×321299008909² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321299038909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160649504454 + 160649504455.

It is an arithmetic number, because the mean of its divisors is an integer number (160649504455).

Almost surely, 2^321299008909 is an apocalyptic number.

It is an amenable number.

321299008909 is a deficient number, since it is larger than the sum of its proper divisors (1).

321299008909 is an equidigital number, since it uses as much as digits as its factorization.

321299008909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 629856, while the sum is 52.

The spelling of 321299008909 in words is "three hundred twenty-one billion, two hundred ninety-nine million, eight thousand, nine hundred nine".