1320101309 has 2 divisors, whose sum is σ = 1320101310. Its totient is φ = 1320101308.

The previous prime is 1320101219. The next prime is 1320101339. The reversal of 1320101309 is 9031010231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1152398809 + 167702500 = 33947^2 + 12950^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1320101309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320101339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660050654 + 660050655.

It is an arithmetic number, because the mean of its divisors is an integer number (660050655).

Almost surely, 2^1320101309 is an apocalyptic number.

It is an amenable number.

1320101309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320101309 is an equidigital number, since it uses as much as digits as its factorization.

1320101309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 1320101309 is about 36333.1984416456. The cubic root of 1320101309 is about 1096.9893734184.

The spelling of 1320101309 in words is "one billion, three hundred twenty million, one hundred one thousand, three hundred nine".