220404040221 has 16 divisors (see below), whose sum is σ = 295609272320. Its totient is φ = 146069043120.

The previous prime is 220404040183. The next prime is 220404040249. The reversal of 220404040221 is 122040404022.

It is not a de Polignac number, because 220404040221 - 2¹⁹ = 220403515933 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220404040621) 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 15 ways as a sum of consecutive naturals, for example, 341076 + ... + 746418.

It is an arithmetic number, because the mean of its divisors is an integer number (18475579520).

Almost surely, 2^220404040221 is an apocalyptic number.

It is an amenable number.

220404040221 is a deficient number, since it is larger than the sum of its proper divisors (75205232099).

220404040221 is a wasteful number, since it uses less digits than its factorization.

220404040221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406416.

The product of its (nonzero) digits is 1024, while the sum is 21.

Adding to 220404040221 its reverse (122040404022), we get a palindrome (342444444243).

The spelling of 220404040221 in words is "two hundred twenty billion, four hundred four million, forty thousand, two hundred twenty-one".