1321799001709 has 16 divisors (see below), whose sum is σ = 1440979848000. Its totient is φ = 1207677461760.

The previous prime is 1321799001643. The next prime is 1321799001713. The reversal of 1321799001709 is 9071009971231.

It is a cyclic number.

It is not a de Polignac number, because 1321799001709 - 2⁹ = 1321799001197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321799001739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 876039 + ... + 1846900.

It is an arithmetic number, because the mean of its divisors is an integer number (90061240500).

Almost surely, 2^{1321799001709} is an apocalyptic number.

1321799001709 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1321799001709 is a deficient number, since it is larger than the sum of its proper divisors (119180846291).

1321799001709 is a wasteful number, since it uses less digits than its factorization.

1321799001709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2723868.

The product of its (nonzero) digits is 214326, while the sum is 49.

The spelling of 1321799001709 in words is "one trillion, three hundred twenty-one billion, seven hundred ninety-nine million, one thousand, seven hundred nine".