1099721320559 has 8 divisors (see below), whose sum is σ = 1105508597760. Its totient is φ = 1093934351800.

The previous prime is 1099721320549. The next prime is 1099721320573. The reversal of 1099721320559 is 9550231279901.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1099721320559 - 2²⁰ = 1099720271983 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1099721320559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1099721320549) 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 in 7 ways as a sum of consecutive naturals, for example, 12148154 + ... + 12238344.

It is an arithmetic number, because the mean of its divisors is an integer number (138188574720).

Almost surely, 2^{1099721320559} is an apocalyptic number.

1099721320559 is a deficient number, since it is larger than the sum of its proper divisors (5787277201).

1099721320559 is an equidigital number, since it uses as much as digits as its factorization.

1099721320559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154221.

The product of its (nonzero) digits is 1530900, while the sum is 53.

The spelling of 1099721320559 in words is "one trillion, ninety-nine billion, seven hundred twenty-one million, three hundred twenty thousand, five hundred fifty-nine".