2221101110221 has 4 divisors (see below), whose sum is σ = 2538401268832. Its totient is φ = 1903800951612.

The previous prime is 2221101110209. The next prime is 2221101110237. The reversal of 2221101110221 is 1220111011222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2221101110221 - 2³⁵ = 2186741371853 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2221101110195 and 2221101110204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221101110321) 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, 158650079295 + ... + 158650079308.

It is an arithmetic number, because the mean of its divisors is an integer number (634600317208).

Almost surely, 2^{2221101110221} is an apocalyptic number.

It is an amenable number.

2221101110221 is a deficient number, since it is larger than the sum of its proper divisors (317300158611).

2221101110221 is an equidigital number, since it uses as much as digits as its factorization.

2221101110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317300158610.

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

Adding to 2221101110221 its reverse (1220111011222), we get a palindrome (3441212121443).

It can be divided in two parts, 222110 and 1110221, that added together give a palindrome (1332331).

The spelling of 2221101110221 in words is "two trillion, two hundred twenty-one billion, one hundred one million, one hundred ten thousand, two hundred twenty-one".