221404219984 has 20 divisors (see below), whose sum is σ = 432906190420. Its totient is φ = 109686493440.

The previous prime is 221404219979. The next prime is 221404219987. The reversal of 221404219984 is 489912404122.

It can be written as a sum of positive squares in 2 ways, for example, as 62586029584 + 158818190400 = 250172^2 + 398520^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221404219987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63474237 + ... + 63477724.

It is an arithmetic number, because the mean of its divisors is an integer number (21645309521).

Almost surely, 2^221404219984 is an apocalyptic number.

It is an amenable number.

221404219984 is a deficient number, since it is larger than the sum of its proper divisors (211501970436).

221404219984 is a wasteful number, since it uses less digits than its factorization.

221404219984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126952078 (or 126952072 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 46.

The spelling of 221404219984 in words is "two hundred twenty-one billion, four hundred four million, two hundred nineteen thousand, nine hundred eighty-four".