221213483191 has 4 divisors (see below), whose sum is σ = 221586525072. Its totient is φ = 220840441312.

The previous prime is 221213483171. The next prime is 221213483201. The reversal of 221213483191 is 191384312122.

221213483191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 221213483191 - 2⁵ = 221213483159 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221213483191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221213483171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186520051 + ... + 186521236.

It is an arithmetic number, because the mean of its divisors is an integer number (55396631268).

Almost surely, 2^221213483191 is an apocalyptic number.

221213483191 is a deficient number, since it is larger than the sum of its proper divisors (373041881).

221213483191 is an equidigital number, since it uses as much as digits as its factorization.

221213483191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373041880.

The product of its digits is 20736, while the sum is 37.

The spelling of 221213483191 in words is "two hundred twenty-one billion, two hundred thirteen million, four hundred eighty-three thousand, one hundred ninety-one".