12222220211121 has 16 divisors (see below), whose sum is σ = 16859517082560. Its totient is φ = 7866577817280.

The previous prime is 12222220211111. The next prime is 12222220211137. The reversal of 12222220211121 is 12111202222221.

It is not a de Polignac number, because 12222220211121 - 2³⁹ = 11672464397233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12222220211101) 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, 4191190 + ... + 6481551.

It is an arithmetic number, because the mean of its divisors is an integer number (1053719817660).

Almost surely, 2^{12222220211121} is an apocalyptic number.

It is an amenable number.

12222220211121 is a deficient number, since it is larger than the sum of its proper divisors (4637296871439).

12222220211121 is a wasteful number, since it uses less digits than its factorization.

12222220211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10685936.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 12222220211121 its reverse (12111202222221), we get a palindrome (24333422433342).

The spelling of 12222220211121 in words is "twelve trillion, two hundred twenty-two billion, two hundred twenty million, two hundred eleven thousand, one hundred twenty-one".