12213110221 has 4 divisors (see below), whose sum is σ = 13152580252. Its totient is φ = 11273640192.

The previous prime is 12213110213. The next prime is 12213110237. The reversal of 12213110221 is 12201131221.

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 5674608900 + 6538501321 = 75330^2 + 80861^2 .

It is a cyclic number.

It is not a de Polignac number, because 12213110221 - 2³ = 12213110213 is a prime.

It is a super-2 number, since 2×12213110221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12213110195 and 12213110204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12213110251) 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, 469734996 + ... + 469735021.

It is an arithmetic number, because the mean of its divisors is an integer number (3288145063).

Almost surely, 2^12213110221 is an apocalyptic number.

It is an amenable number.

12213110221 is a deficient number, since it is larger than the sum of its proper divisors (939470031).

12213110221 is an equidigital number, since it uses as much as digits as its factorization.

12213110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939470030.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 12213110221 its reverse (12201131221), we get a palindrome (24414241442).

The spelling of 12213110221 in words is "twelve billion, two hundred thirteen million, one hundred ten thousand, two hundred twenty-one".