221244411331 has 16 divisors (see below), whose sum is σ = 225497226240. Its totient is φ = 217021020480.

The previous prime is 221244411317. The next prime is 221244411341. The reversal of 221244411331 is 133114442122.

It is a happy number.

221244411331 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 221244411331 - 2³⁵ = 186884672963 is a prime.

It is a super-2 number, since 2×221244411331² (a number of 23 digits) contains 22 as substring.

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 221244411331.

It is not an unprimeable number, because it can be changed into a prime (221244411301) 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 15 ways as a sum of consecutive naturals, for example, 22853350 + ... + 22863028.

It is an arithmetic number, because the mean of its divisors is an integer number (14093576640).

Almost surely, 2^221244411331 is an apocalyptic number.

221244411331 is a deficient number, since it is larger than the sum of its proper divisors (4252814909).

221244411331 is a wasteful number, since it uses less digits than its factorization.

221244411331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11154.

The product of its digits is 4608, while the sum is 28.

Adding to 221244411331 its reverse (133114442122), we get a palindrome (354358853453).

The spelling of 221244411331 in words is "two hundred twenty-one billion, two hundred forty-four million, four hundred eleven thousand, three hundred thirty-one".