221644132111 has 2 divisors, whose sum is σ = 221644132112. Its totient is φ = 221644132110.

The previous prime is 221644132063. The next prime is 221644132147. The reversal of 221644132111 is 111231446122.

It is a happy number.

221644132111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221644132111 - 2¹¹ = 221644130063 is a prime.

It is a super-2 number, since 2×221644132111² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221644132111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221644139111) 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 as a sum of consecutive naturals, namely, 110822066055 + 110822066056.

It is an arithmetic number, because the mean of its divisors is an integer number (110822066056).

Almost surely, 2^221644132111 is an apocalyptic number.

221644132111 is a deficient number, since it is larger than the sum of its proper divisors (1).

221644132111 is an equidigital number, since it uses as much as digits as its factorization.

221644132111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 28.

Adding to 221644132111 its reverse (111231446122), we get a palindrome (332875578233).

The spelling of 221644132111 in words is "two hundred twenty-one billion, six hundred forty-four million, one hundred thirty-two thousand, one hundred eleven".