12221320024121 has 16 divisors (see below), whose sum is σ = 13509985562304. Its totient is φ = 10984104581184.

The previous prime is 12221320024097. The next prime is 12221320024127. The reversal of 12221320024121 is 12142002312221.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12221320024121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12221320024127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34306751 + ... + 34661156.

It is an arithmetic number, because the mean of its divisors is an integer number (844374097644).

Almost surely, 2^{12221320024121} is an apocalyptic number.

It is an amenable number.

12221320024121 is a deficient number, since it is larger than the sum of its proper divisors (1288665538183).

12221320024121 is a wasteful number, since it uses less digits than its factorization.

12221320024121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68968280.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 12221320024121 its reverse (12142002312221), we get a palindrome (24363322336342).

The spelling of 12221320024121 in words is "twelve trillion, two hundred twenty-one billion, three hundred twenty million, twenty-four thousand, one hundred twenty-one".