221232431104221 has 8 divisors (see below), whose sum is σ = 294976950559200. Its totient is φ = 147488099526032.

The previous prime is 221232431104207. The next prime is 221232431104231. The reversal of 221232431104221 is 122401134232122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221232431104221 - 2²¹ = 221232429007069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221232431104231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44198250 + ... + 48948443.

It is an arithmetic number, because the mean of its divisors is an integer number (36872118819900).

Almost surely, 2^{221232431104221} is an apocalyptic number.

It is an amenable number.

221232431104221 is a deficient number, since it is larger than the sum of its proper divisors (73744519454979).

221232431104221 is an equidigital number, since it uses as much as digits as its factorization.

221232431104221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93938395.

The product of its (nonzero) digits is 9216, while the sum is 30.

Adding to 221232431104221 its reverse (122401134232122), we get a palindrome (343633565336343).

The spelling of 221232431104221 in words is "two hundred twenty-one trillion, two hundred thirty-two billion, four hundred thirty-one million, one hundred four thousand, two hundred twenty-one".