1320644551301 has 2 divisors, whose sum is σ = 1320644551302. Its totient is φ = 1320644551300.

The previous prime is 1320644551231. The next prime is 1320644551307. The reversal of 1320644551301 is 1031554460231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1229681388100 + 90963163201 = 1108910^2 + 301601^2 .

It is an emirp because it is prime and its reverse (1031554460231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1320644551301 - 2³⁰ = 1319570809477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320644551307) 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, 660322275650 + 660322275651.

It is an arithmetic number, because the mean of its divisors is an integer number (660322275651).

Almost surely, 2^{1320644551301} is an apocalyptic number.

It is an amenable number.

1320644551301 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320644551301 is an equidigital number, since it uses as much as digits as its factorization.

1320644551301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 1320644551301 in words is "one trillion, three hundred twenty billion, six hundred forty-four million, five hundred fifty-one thousand, three hundred one".