2016663842221 has 8 divisors (see below), whose sum is σ = 2360972303424. Its totient is φ = 1686408787680.

The previous prime is 2016663842209. The next prime is 2016663842287. The reversal of 2016663842221 is 1222483666102.

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

It is a cyclic number.

It is not a de Polignac number, because 2016663842221 - 2³⁵ = 1982304103853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2016663840221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3513351355 + ... + 3513351928.

It is an arithmetic number, because the mean of its divisors is an integer number (295121537928).

Almost surely, 2^{2016663842221} is an apocalyptic number.

It is an amenable number.

2016663842221 is a deficient number, since it is larger than the sum of its proper divisors (344308461203).

2016663842221 is an equidigital number, since it uses as much as digits as its factorization.

2016663842221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7026703331.

The product of its (nonzero) digits is 331776, while the sum is 43.

The spelling of 2016663842221 in words is "two trillion, sixteen billion, six hundred sixty-three million, eight hundred forty-two thousand, two hundred twenty-one".