221944746027 has 4 divisors (see below), whose sum is σ = 295926328040. Its totient is φ = 147963164016.

The previous prime is 221944745989. The next prime is 221944746031. The reversal of 221944746027 is 720647449122.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 221944746027 - 2¹⁹ = 221944221739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221944746097) 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 3 ways as a sum of consecutive naturals, for example, 36990791002 + ... + 36990791007.

It is an arithmetic number, because the mean of its divisors is an integer number (73981582010).

Almost surely, 2^221944746027 is an apocalyptic number.

221944746027 is a deficient number, since it is larger than the sum of its proper divisors (73981582013).

221944746027 is an equidigital number, since it uses as much as digits as its factorization.

221944746027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73981582012.

The product of its (nonzero) digits is 1354752, while the sum is 48.

The spelling of 221944746027 in words is "two hundred twenty-one billion, nine hundred forty-four million, seven hundred forty-six thousand, twenty-seven".