21222221110223 has 8 divisors (see below), whose sum is σ = 24303364068480. Its totient is φ = 18153427423320.

The previous prime is 21222221110171. The next prime is 21222221110229. The reversal of 21222221110223 is 32201112222212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21222221110223 - 2⁶ = 21222221110159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222221110229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3087314153 + ... + 3087321026.

It is an arithmetic number, because the mean of its divisors is an integer number (3037920508560).

Almost surely, 2^{21222221110223} is an apocalyptic number.

21222221110223 is a deficient number, since it is larger than the sum of its proper divisors (3081142958257).

21222221110223 is an equidigital number, since it uses as much as digits as its factorization.

21222221110223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6174635677.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 21222221110223 its reverse (32201112222212), we get a palindrome (53423333332435).

The spelling of 21222221110223 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twenty-one million, one hundred ten thousand, two hundred twenty-three".