221221312441 has 8 divisors (see below), whose sum is σ = 221631569600. Its totient is φ = 220811262192.

The previous prime is 221221312427. The next prime is 221221312531. The reversal of 221221312441 is 144213122122.

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 221221312441 - 2¹⁵ = 221221279673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221221312421) 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, 2177035 + ... + 2276383.

It is an arithmetic number, because the mean of its divisors is an integer number (27703946200).

Almost surely, 2^221221312441 is an apocalyptic number.

It is an amenable number.

221221312441 is a deficient number, since it is larger than the sum of its proper divisors (410257159).

221221312441 is an equidigital number, since it uses as much as digits as its factorization.

221221312441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103455.

The product of its digits is 1536, while the sum is 25.

Adding to 221221312441 its reverse (144213122122), we get a palindrome (365434434563).

The spelling of 221221312441 in words is "two hundred twenty-one billion, two hundred twenty-one million, three hundred twelve thousand, four hundred forty-one".