16221353841 has 128 divisors (see below), whose sum is σ = 31720550400. Its totient is φ = 7945620480.

The previous prime is 16221353839. The next prime is 16221353851. The reversal of 16221353841 is 14835312261.

16221353841 is a `hidden beast` number, since 1 + 6 + 221 + 353 + 84 + 1 = 666.

It is not a de Polignac number, because 16221353841 - 2¹ = 16221353839 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16221353796 and 16221353805.

It is not an unprimeable number, because it can be changed into a prime (16221353851) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2589385 + ... + 2595641.

It is an arithmetic number, because the mean of its divisors is an integer number (247816800).

Almost surely, 2^16221353841 is an apocalyptic number.

16221353841 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16221353841 is a deficient number, since it is larger than the sum of its proper divisors (15499196559).

16221353841 is a wasteful number, since it uses less digits than its factorization.

16221353841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6356 (or 6350 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The spelling of 16221353841 in words is "sixteen billion, two hundred twenty-one million, three hundred fifty-three thousand, eight hundred forty-one".