12222123112221 has 16 divisors (see below), whose sum is σ = 18113060669760. Its totient is φ = 7267586069120.

The previous prime is 12222123112097. The next prime is 12222123112237. The reversal of 12222123112221 is 12221132122221.

It is a cyclic number.

It is not a de Polignac number, because 12222123112221 - 2¹³ = 12222123104029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12222123112191 and 12222123112200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222123112721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3494030016 + ... + 3494033513.

It is an arithmetic number, because the mean of its divisors is an integer number (1132066291860).

Almost surely, 2^{12222123112221} is an apocalyptic number.

12222123112221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12222123112221 is a deficient number, since it is larger than the sum of its proper divisors (5890937557539).

12222123112221 is a wasteful number, since it uses less digits than its factorization.

12222123112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6988063596.

The product of its digits is 768, while the sum is 24.

Adding to 12222123112221 its reverse (12221132122221), we get a palindrome (24443255234442).

The spelling of 12222123112221 in words is "twelve trillion, two hundred twenty-two billion, one hundred twenty-three million, one hundred twelve thousand, two hundred twenty-one".