16221055109 has 24 divisors (see below), whose sum is σ = 19025127576. Its totient is φ = 13789440000.

The previous prime is 16221055099. The next prime is 16221055127. The reversal of 16221055109 is 90155012261.

16221055109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1520220100 + 14700835009 = 38990^2 + 121247^2 .

It is not a de Polignac number, because 16221055109 - 2²⁴ = 16204277893 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16221055139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3554189 + ... + 3558749.

It is an arithmetic number, because the mean of its divisors is an integer number (792713649).

Almost surely, 2^16221055109 is an apocalyptic number.

It is an amenable number.

16221055109 is a deficient number, since it is larger than the sum of its proper divisors (2804072467).

16221055109 is a wasteful number, since it uses less digits than its factorization.

16221055109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5157 (or 5150 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 32.

The spelling of 16221055109 in words is "sixteen billion, two hundred twenty-one million, fifty-five thousand, one hundred nine".