221820383211 has 8 divisors (see below), whose sum is σ = 338012012544. Its totient is φ = 126754504680.

The previous prime is 221820383189. The next prime is 221820383227. The reversal of 221820383211 is 112383028122.

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

It is not a de Polignac number, because 221820383211 - 2⁹ = 221820382699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221820387211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5281437675 + ... + 5281437716.

It is an arithmetic number, because the mean of its divisors is an integer number (42251501568).

Almost surely, 2^221820383211 is an apocalyptic number.

221820383211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

221820383211 is a deficient number, since it is larger than the sum of its proper divisors (116191629333).

221820383211 is a wasteful number, since it uses less digits than its factorization.

221820383211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10562875401.

The product of its (nonzero) digits is 9216, while the sum is 33.

The spelling of 221820383211 in words is "two hundred twenty-one billion, eight hundred twenty million, three hundred eighty-three thousand, two hundred eleven".