12022112221 has 6 divisors (see below), whose sum is σ = 13984906110. Its totient is φ = 10304667576.

The previous prime is 12022112189. The next prime is 12022112239. The reversal of 12022112221 is 12221122021.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 6259024996 + 5763087225 = 79114^2 + 75915^2 .

It is not a de Polignac number, because 12022112221 - 2⁵ = 12022112189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12022112195 and 12022112204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12022118221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 122674566 + ... + 122674663.

It is an arithmetic number, because the mean of its divisors is an integer number (2330817685).

Almost surely, 2^12022112221 is an apocalyptic number.

It is an amenable number.

12022112221 is a deficient number, since it is larger than the sum of its proper divisors (1962793889).

12022112221 is an equidigital number, since it uses as much as digits as its factorization.

12022112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245349243 (or 245349236 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12022112221 its reverse (12221122021), we get a palindrome (24243234242).

The spelling of 12022112221 in words is "twelve billion, twenty-two million, one hundred twelve thousand, two hundred twenty-one".