1320208203269 has 2 divisors, whose sum is σ = 1320208203270. Its totient is φ = 1320208203268.

The previous prime is 1320208203257. The next prime is 1320208203271. The reversal of 1320208203269 is 9623028020231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1087561151044 + 232647052225 = 1042862^2 + 482335^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1320208203269 is a prime.

It is a super-2 number, since 2×1320208203269² (a number of 25 digits) contains 22 as substring.

Together with 1320208203271, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320208203869) 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, 660104101634 + 660104101635.

It is an arithmetic number, because the mean of its divisors is an integer number (660104101635).

Almost surely, 2^{1320208203269} is an apocalyptic number.

It is an amenable number.

1320208203269 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320208203269 is an equidigital number, since it uses as much as digits as its factorization.

1320208203269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 38.

The spelling of 1320208203269 in words is "one trillion, three hundred twenty billion, two hundred eight million, two hundred three thousand, two hundred sixty-nine".