20321321011099 has 4 divisors (see below), whose sum is σ = 20976847495360. Its totient is φ = 19665794526840.

The previous prime is 20321321011031. The next prime is 20321321011129. The reversal of 20321321011099 is 99011012312302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20321321011099 - 2³⁷ = 20183882057627 is a prime.

It is a super-2 number, since 2×20321321011099² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20321321017099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327763242084 + ... + 327763242145.

It is an arithmetic number, because the mean of its divisors is an integer number (5244211873840).

Almost surely, 2^{20321321011099} is an apocalyptic number.

20321321011099 is a deficient number, since it is larger than the sum of its proper divisors (655526484261).

20321321011099 is an equidigital number, since it uses as much as digits as its factorization.

20321321011099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655526484260.

The product of its (nonzero) digits is 5832, while the sum is 34.

The spelling of 20321321011099 in words is "twenty trillion, three hundred twenty-one billion, three hundred twenty-one million, eleven thousand, ninety-nine".