222004400221 has 16 divisors (see below), whose sum is σ = 232807873536. Its totient is φ = 211297781376.

The previous prime is 222004400201. The next prime is 222004400297. The reversal of 222004400221 is 122004400222.

It is a cyclic number.

It is not a de Polignac number, because 222004400221 - 2¹¹ = 222004398173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222004400201) 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, 11956681 + ... + 11975233.

It is an arithmetic number, because the mean of its divisors is an integer number (14550492096).

Almost surely, 2^222004400221 is an apocalyptic number.

It is an amenable number.

222004400221 is a deficient number, since it is larger than the sum of its proper divisors (10803473315).

222004400221 is a wasteful number, since it uses less digits than its factorization.

222004400221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21132.

The product of its (nonzero) digits is 512, while the sum is 19.

Adding to 222004400221 its reverse (122004400222), we get a palindrome (344008800443).

Subtracting from 222004400221 its reverse (122004400222), we obtain a palindrome (99999999999).

The spelling of 222004400221 in words is "two hundred twenty-two billion, four million, four hundred thousand, two hundred twenty-one".