220111010100221 has 4 divisors (see below), whose sum is σ = 220470081895452. Its totient is φ = 219751938304992.

The previous prime is 220111010100209. The next prime is 220111010100229. The reversal of 220111010100221 is 122001010111022.

220111010100221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2737416576196 + 217373593524025 = 1654514^2 + 14743595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220111010100221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220111010100196 and 220111010100205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220111010100229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179535896696 + ... + 179535897921.

It is an arithmetic number, because the mean of its divisors is an integer number (55117520473863).

Almost surely, 2^{220111010100221} is an apocalyptic number.

It is an amenable number.

220111010100221 is a deficient number, since it is larger than the sum of its proper divisors (359071795231).

220111010100221 is an equidigital number, since it uses as much as digits as its factorization.

220111010100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359071795230.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 220111010100221 its reverse (122001010111022), we get a palindrome (342112020211243).

The spelling of 220111010100221 in words is "two hundred twenty trillion, one hundred eleven billion, ten million, one hundred thousand, two hundred twenty-one".