220111002110221 has 4 divisors (see below), whose sum is σ = 220111067576700. Its totient is φ = 220110936643744.

The previous prime is 220111002110203. The next prime is 220111002110267. The reversal of 220111002110221 is 122011200111022.

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 198736376617321 + 21374625492900 = 14097389^2 + 4623270^2 .

It is a cyclic number.

It is not a de Polignac number, because 220111002110221 - 2⁷ = 220111002110093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220111002110195 and 220111002110204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220111002110201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27400336 + ... + 34510873.

It is an arithmetic number, because the mean of its divisors is an integer number (55027766894175).

Almost surely, 2^{220111002110221} is an apocalyptic number.

It is an amenable number.

220111002110221 is a deficient number, since it is larger than the sum of its proper divisors (65466479).

220111002110221 is an equidigital number, since it uses as much as digits as its factorization.

220111002110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65466478.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 220111002110221 its reverse (122011200111022), we get a palindrome (342122202221243).

The spelling of 220111002110221 in words is "two hundred twenty trillion, one hundred eleven billion, two million, one hundred ten thousand, two hundred twenty-one".