221501044013441 has 4 divisors (see below), whose sum is σ = 221505830270400. Its totient is φ = 221496257756484.

The previous prime is 221501044013419. The next prime is 221501044013443. The reversal of 221501044013441 is 144310440105122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221501044013441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221501044013398 and 221501044013407.

It is not an unprimeable number, because it can be changed into a prime (221501044013443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2393059061 + ... + 2393151618.

It is an arithmetic number, because the mean of its divisors is an integer number (55376457567600).

Almost surely, 2^{221501044013441} is an apocalyptic number.

It is an amenable number.

221501044013441 is a deficient number, since it is larger than the sum of its proper divisors (4786256959).

221501044013441 is an equidigital number, since it uses as much as digits as its factorization.

221501044013441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4786256958.

The product of its (nonzero) digits is 15360, while the sum is 32.

Adding to 221501044013441 its reverse (144310440105122), we get a palindrome (365811484118563).

The spelling of 221501044013441 in words is "two hundred twenty-one trillion, five hundred one billion, forty-four million, thirteen thousand, four hundred forty-one".