1321361503177 has 2 divisors, whose sum is σ = 1321361503178. Its totient is φ = 1321361503176.

The previous prime is 1321361503171. The next prime is 1321361503223. The reversal of 1321361503177 is 7713051631231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1056816896256 + 264544606921 = 1028016^2 + 514339^2 .

It is an emirp because it is prime and its reverse (7713051631231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1321361503177 - 2¹⁵ = 1321361470409 is a prime.

It is not a weakly prime, because it can be changed into another prime (1321361503171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660680751588 + 660680751589.

It is an arithmetic number, because the mean of its divisors is an integer number (660680751589).

Almost surely, 2^{1321361503177} is an apocalyptic number.

It is an amenable number.

1321361503177 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321361503177 is an equidigital number, since it uses as much as digits as its factorization.

1321361503177 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 79380, while the sum is 40.

The spelling of 1321361503177 in words is "one trillion, three hundred twenty-one billion, three hundred sixty-one million, five hundred three thousand, one hundred seventy-seven".