221044204401 has 16 divisors (see below), whose sum is σ = 299845540800. Its totient is φ = 144804912128.

The previous prime is 221044204361. The next prime is 221044204453. The reversal of 221044204401 is 104402440122.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221044204401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221044204001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169465 + ... + 686153.

It is an arithmetic number, because the mean of its divisors is an integer number (18740346300).

Almost surely, 2^221044204401 is an apocalyptic number.

It is an amenable number.

221044204401 is a deficient number, since it is larger than the sum of its proper divisors (78801336399).

221044204401 is a wasteful number, since it uses less digits than its factorization.

221044204401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519168.

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 221044204401 its reverse (104402440122), we get a palindrome (325446644523).

The spelling of 221044204401 in words is "two hundred twenty-one billion, forty-four million, two hundred four thousand, four hundred one".