220110110221 has 4 divisors (see below), whose sum is σ = 220618448092. Its totient is φ = 219601772352.

The previous prime is 220110110167. The next prime is 220110110249. The reversal of 220110110221 is 122011011022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29237238121 + 190872872100 = 170989^2 + 436890^2 .

It is a cyclic number.

It is not a de Polignac number, because 220110110221 - 2¹¹ = 220110108173 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 (220110110021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254168286 + ... + 254169151.

It is an arithmetic number, because the mean of its divisors is an integer number (55154612023).

Almost surely, 2^220110110221 is an apocalyptic number.

It is an amenable number.

220110110221 is a deficient number, since it is larger than the sum of its proper divisors (508337871).

220110110221 is an equidigital number, since it uses as much as digits as its factorization.

220110110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508337870.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 220110110221 its reverse (122011011022), we get a palindrome (342121121243).

The spelling of 220110110221 in words is "two hundred twenty billion, one hundred ten million, one hundred ten thousand, two hundred twenty-one".