16021451588221 has 16 divisors (see below), whose sum is σ = 16313728394880. Its totient is φ = 15729870911040.

The previous prime is 16021451588213. The next prime is 16021451588237. The reversal of 16021451588221 is 12288515412061.

16021451588221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 16021451588221 - 2³ = 16021451588213 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 (16021451588921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 449051635 + ... + 449087311.

It is an arithmetic number, because the mean of its divisors is an integer number (1019608024680).

Almost surely, 2^{16021451588221} is an apocalyptic number.

It is an amenable number.

16021451588221 is a deficient number, since it is larger than the sum of its proper divisors (292276806659).

16021451588221 is an equidigital number, since it uses as much as digits as its factorization.

16021451588221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45204.

The product of its (nonzero) digits is 307200, while the sum is 46.

The spelling of 16021451588221 in words is "sixteen trillion, twenty-one billion, four hundred fifty-one million, five hundred eighty-eight thousand, two hundred twenty-one".