10311320209 has 2 divisors, whose sum is σ = 10311320210. Its totient is φ = 10311320208.

The previous prime is 10311320203. The next prime is 10311320231. The reversal of 10311320209 is 90202311301.

It is an a-pointer prime, because the next prime (10311320231) can be obtained adding 10311320209 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7838446225 + 2472873984 = 88535^2 + 49728^2 .

It is a cyclic number.

It is not a de Polignac number, because 10311320209 - 2¹³ = 10311312017 is a prime.

It is a super-3 number, since 3×10311320209³ (a number of 31 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10311320209.

It is not a weakly prime, because it can be changed into another prime (10311320203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5155660104 + 5155660105.

It is an arithmetic number, because the mean of its divisors is an integer number (5155660105).

Almost surely, 2^10311320209 is an apocalyptic number.

It is an amenable number.

10311320209 is a deficient number, since it is larger than the sum of its proper divisors (1).

10311320209 is an equidigital number, since it uses as much as digits as its factorization.

10311320209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 22.

The spelling of 10311320209 in words is "ten billion, three hundred eleven million, three hundred twenty thousand, two hundred nine".