221220022105 has 8 divisors (see below), whose sum is σ = 265509728712. Its totient is φ = 176945549568.

The previous prime is 221220022099. The next prime is 221220022141. The reversal of 221220022105 is 501220022122.

It can be written as a sum of positive squares in 4 ways, for example, as 64169502489 + 157050519616 = 253317^2 + 396296^2 .

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 221220022105 - 2⁵ = 221220022073 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3776544 + ... + 3834673.

It is an arithmetic number, because the mean of its divisors is an integer number (33188716089).

Almost surely, 2^221220022105 is an apocalyptic number.

It is an amenable number.

221220022105 is a deficient number, since it is larger than the sum of its proper divisors (44289706607).

221220022105 is an equidigital number, since it uses as much as digits as its factorization.

221220022105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7617035.

The product of its (nonzero) digits is 320, while the sum is 19.

Adding to 221220022105 its reverse (501220022122), we get a palindrome (722440044227).

The spelling of 221220022105 in words is "two hundred twenty-one billion, two hundred twenty million, twenty-two thousand, one hundred five".