1031320001209 has 2 divisors, whose sum is σ = 1031320001210. Its totient is φ = 1031320001208.

The previous prime is 1031320001147. The next prime is 1031320001249. The reversal of 1031320001209 is 9021000231301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 575971709184 + 455348292025 = 758928^2 + 674795^2 .

It is an emirp because it is prime and its reverse (9021000231301) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1031320001209 - 2¹⁹ = 1031319476921 is a prime.

It is a super-2 number, since 2×1031320001209² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1031320001209.

It is not a weakly prime, because it can be changed into another prime (1031320001249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515660000604 + 515660000605.

It is an arithmetic number, because the mean of its divisors is an integer number (515660000605).

Almost surely, 2^{1031320001209} is an apocalyptic number.

It is an amenable number.

1031320001209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031320001209 is an equidigital number, since it uses as much as digits as its factorization.

1031320001209 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 1031320001209 in words is "one trillion, thirty-one billion, three hundred twenty million, one thousand, two hundred nine".