221211444343 has 4 divisors (see below), whose sum is σ = 232854151960. Its totient is φ = 209568736728.

The previous prime is 221211444329. The next prime is 221211444353. The reversal of 221211444343 is 343444112122.

It is a happy number.

221211444343 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 not a de Polignac number, because 221211444343 - 2¹³ = 221211436151 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 (221211444353) 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, 5821353780 + ... + 5821353817.

It is an arithmetic number, because the mean of its divisors is an integer number (58213537990).

Almost surely, 2^221211444343 is an apocalyptic number.

221211444343 is a deficient number, since it is larger than the sum of its proper divisors (11642707617).

221211444343 is a wasteful number, since it uses less digits than its factorization.

221211444343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11642707616.

The product of its digits is 18432, while the sum is 31.

Adding to 221211444343 its reverse (343444112122), we get a palindrome (564655556465).

The spelling of 221211444343 in words is "two hundred twenty-one billion, two hundred eleven million, four hundred forty-four thousand, three hundred forty-three".