16821442159211 has 2 divisors, whose sum is σ = 16821442159212. Its totient is φ = 16821442159210.

The previous prime is 16821442159199. The next prime is 16821442159213. The reversal of 16821442159211 is 11295124412861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16821442159211 - 2⁶ = 16821442159147 is a prime.

Together with 16821442159213, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16821442159213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8410721079605 + 8410721079606.

It is an arithmetic number, because the mean of its divisors is an integer number (8410721079606).

Almost surely, 2^{16821442159211} is an apocalyptic number.

16821442159211 is a deficient number, since it is larger than the sum of its proper divisors (1).

16821442159211 is an equidigital number, since it uses as much as digits as its factorization.

16821442159211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 276480, while the sum is 47.

The spelling of 16821442159211 in words is "sixteen trillion, eight hundred twenty-one billion, four hundred forty-two million, one hundred fifty-nine thousand, two hundred eleven".