221204545041 has 4 divisors (see below), whose sum is σ = 294939393392. Its totient is φ = 147469696692.

The previous prime is 221204545039. The next prime is 221204545049. The reversal of 221204545041 is 140545402122.

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 not a de Polignac number, because 221204545041 - 2¹ = 221204545039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221204545049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36867424171 + ... + 36867424176.

It is an arithmetic number, because the mean of its divisors is an integer number (73734848348).

Almost surely, 2^221204545041 is an apocalyptic number.

It is an amenable number.

221204545041 is a deficient number, since it is larger than the sum of its proper divisors (73734848351).

221204545041 is an equidigital number, since it uses as much as digits as its factorization.

221204545041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73734848350.

The product of its (nonzero) digits is 12800, while the sum is 30.

Adding to 221204545041 its reverse (140545402122), we get a palindrome (361749947163).

The spelling of 221204545041 in words is "two hundred twenty-one billion, two hundred four million, five hundred forty-five thousand, forty-one".