12222213022121 has 4 divisors (see below), whose sum is σ = 12222227347200. Its totient is φ = 12222198697044.

The previous prime is 12222213022109. The next prime is 12222213022133. The reversal of 12222213022121 is 12122031222221.

12222213022121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (12222213022109) and next prime (12222213022133).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12222213022121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12222213022421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5795801 + ... + 7618118.

It is an arithmetic number, because the mean of its divisors is an integer number (3055556836800).

Almost surely, 2^{12222213022121} is an apocalyptic number.

It is an amenable number.

12222213022121 is a deficient number, since it is larger than the sum of its proper divisors (14325079).

12222213022121 is an equidigital number, since it uses as much as digits as its factorization.

12222213022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14325078.

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

Adding to 12222213022121 its reverse (12122031222221), we get a palindrome (24344244244342).

The spelling of 12222213022121 in words is "twelve trillion, two hundred twenty-two billion, two hundred thirteen million, twenty-two thousand, one hundred twenty-one".