1321757086321 has 4 divisors (see below), whose sum is σ = 1510579527232. Its totient is φ = 1132934645412.

The previous prime is 1321757086301. The next prime is 1321757086367. The reversal of 1321757086321 is 1236807571231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1321757086321 - 2⁵ = 1321757086289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321757086301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94411220445 + ... + 94411220458.

It is an arithmetic number, because the mean of its divisors is an integer number (377644881808).

Almost surely, 2^{1321757086321} is an apocalyptic number.

It is an amenable number.

1321757086321 is a deficient number, since it is larger than the sum of its proper divisors (188822440911).

1321757086321 is an equidigital number, since it uses as much as digits as its factorization.

1321757086321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188822440910.

The product of its (nonzero) digits is 423360, while the sum is 46.

The spelling of 1321757086321 in words is "one trillion, three hundred twenty-one billion, seven hundred fifty-seven million, eighty-six thousand, three hundred twenty-one".