221232565141 has 6 divisors (see below), whose sum is σ = 257352167670. Its totient is φ = 189627912936.

The previous prime is 221232565139. The next prime is 221232565157. The reversal of 221232565141 is 141565232122.

It is a happy number.

221232565141 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 117985380100 + 103247185041 = 343490^2 + 321321^2 .

It is not a de Polignac number, because 221232565141 - 2¹ = 221232565139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221232565097 and 221232565106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221232565121) 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 5 ways as a sum of consecutive naturals, for example, 2257475106 + ... + 2257475203.

It is an arithmetic number, because the mean of its divisors is an integer number (42892027945).

Almost surely, 2^221232565141 is an apocalyptic number.

It is an amenable number.

221232565141 is a deficient number, since it is larger than the sum of its proper divisors (36119602529).

221232565141 is an equidigital number, since it uses as much as digits as its factorization.

221232565141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4514950323 (or 4514950316 counting only the distinct ones).

The product of its digits is 28800, while the sum is 34.

Adding to 221232565141 its reverse (141565232122), we get a palindrome (362797797263).

The spelling of 221232565141 in words is "two hundred twenty-one billion, two hundred thirty-two million, five hundred sixty-five thousand, one hundred forty-one".