16682206211821 has 4 divisors (see below), whose sum is σ = 16883196648192. Its totient is φ = 16481215775452.

The previous prime is 16682206211729. The next prime is 16682206211837. The reversal of 16682206211821 is 12811260228661.

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 16682206211821 - 2²⁹ = 16681669340909 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 (16682206211521) 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, 100495218061 + ... + 100495218226.

It is an arithmetic number, because the mean of its divisors is an integer number (4220799162048).

Almost surely, 2^{16682206211821} is an apocalyptic number.

It is an amenable number.

16682206211821 is a deficient number, since it is larger than the sum of its proper divisors (200990436371).

16682206211821 is an equidigital number, since it uses as much as digits as its factorization.

16682206211821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200990436370.

The product of its (nonzero) digits is 221184, while the sum is 46.

The spelling of 16682206211821 in words is "sixteen trillion, six hundred eighty-two billion, two hundred six million, two hundred eleven thousand, eight hundred twenty-one".