16573412324221 has 4 divisors (see below), whose sum is σ = 16607443972192. Its totient is φ = 16539380676252.

The previous prime is 16573412324197. The next prime is 16573412324237. The reversal of 16573412324221 is 12242321437561.

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 a de Polignac number, because none of the positive numbers 2^k-16573412324221 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 (16573412324281) 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, 17015823255 + ... + 17015824228.

It is an arithmetic number, because the mean of its divisors is an integer number (4151860993048).

Almost surely, 2^{16573412324221} is an apocalyptic number.

It is an amenable number.

16573412324221 is a deficient number, since it is larger than the sum of its proper divisors (34031647971).

16573412324221 is an equidigital number, since it uses as much as digits as its factorization.

16573412324221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34031647970.

The product of its digits is 483840, while the sum is 43.

The spelling of 16573412324221 in words is "sixteen trillion, five hundred seventy-three billion, four hundred twelve million, three hundred twenty-four thousand, two hundred twenty-one".