1321331200169 has 2 divisors, whose sum is σ = 1321331200170. Its totient is φ = 1321331200168.

The previous prime is 1321331200151. The next prime is 1321331200171. The reversal of 1321331200169 is 9610021331231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1067839089769 + 253492110400 = 1033363^2 + 503480^2 .

It is an emirp because it is prime and its reverse (9610021331231) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321331200169 is a prime.

It is a super-2 number, since 2×1321331200169² (a number of 25 digits) contains 22 as substring.

Together with 1321331200171, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1321331200369) 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, 660665600084 + 660665600085.

It is an arithmetic number, because the mean of its divisors is an integer number (660665600085).

Almost surely, 2^{1321331200169} is an apocalyptic number.

It is an amenable number.

1321331200169 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321331200169 is an equidigital number, since it uses as much as digits as its factorization.

1321331200169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 32.

The spelling of 1321331200169 in words is "one trillion, three hundred twenty-one billion, three hundred thirty-one million, two hundred thousand, one hundred sixty-nine".