221331302221 has 8 divisors (see below), whose sum is σ = 226244355840. Its totient is φ = 216426743568.

The previous prime is 221331302207. The next prime is 221331302251. The reversal of 221331302221 is 122203133122.

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 221331302221 - 2¹¹ = 221331300173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221331302192 and 221331302201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221331302251) 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, 2071041 + ... + 2175286.

It is an arithmetic number, because the mean of its divisors is an integer number (28280544480).

Almost surely, 2^221331302221 is an apocalyptic number.

It is an amenable number.

221331302221 is a deficient number, since it is larger than the sum of its proper divisors (4913053619).

221331302221 is a wasteful number, since it uses less digits than its factorization.

221331302221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4247483.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 221331302221 its reverse (122203133122), we get a palindrome (343534435343).

The spelling of 221331302221 in words is "two hundred twenty-one billion, three hundred thirty-one million, three hundred two thousand, two hundred twenty-one".