12222120011221 has 16 divisors (see below), whose sum is σ = 12766150744704. Its totient is φ = 11679147177984.

The previous prime is 12222120011209. The next prime is 12222120011273. The reversal of 12222120011221 is 12211002122221.

It is a cyclic number.

It is not a de Polignac number, because 12222120011221 - 2¹⁷ = 12222119880149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222120051221) 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, 111038005 + ... + 111148021.

It is an arithmetic number, because the mean of its divisors is an integer number (797884421544).

Almost surely, 2^{12222120011221} is an apocalyptic number.

It is an amenable number.

12222120011221 is a deficient number, since it is larger than the sum of its proper divisors (544030733483).

12222120011221 is a wasteful number, since it uses less digits than its factorization.

12222120011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114780.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 12222120011221 its reverse (12211002122221), we get a palindrome (24433122133442).

The spelling of 12222120011221 in words is "twelve trillion, two hundred twenty-two billion, one hundred twenty million, eleven thousand, two hundred twenty-one".