12221121002221 has 8 divisors (see below), whose sum is σ = 12235434211584. Its totient is φ = 12206813520720.

The previous prime is 12221121002191. The next prime is 12221121002243. The reversal of 12221121002221 is 12220012112221.

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

It is a cyclic number.

It is not a de Polignac number, because 12221121002221 - 2¹⁷ = 12221120871149 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 (12221121002621) 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, 2845260 + ... + 5704186.

It is an arithmetic number, because the mean of its divisors is an integer number (1529429276448).

Almost surely, 2^{12221121002221} is an apocalyptic number.

It is an amenable number.

12221121002221 is a deficient number, since it is larger than the sum of its proper divisors (14313209363).

12221121002221 is a wasteful number, since it uses less digits than its factorization.

12221121002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2863931.

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

Adding to 12221121002221 its reverse (12220012112221), we get a palindrome (24441133114442).

Subtracting from 12221121002221 its reverse (12220012112221), we obtain a square (1108890000 = 33300²).

The spelling of 12221121002221 in words is "twelve trillion, two hundred twenty-one billion, one hundred twenty-one million, two thousand, two hundred twenty-one".