12222111200121 has 48 divisors (see below), whose sum is σ = 18949884954000. Its totient is φ = 7575568809984.

The previous prime is 12222111200113. The next prime is 12222111200129. The reversal of 12222111200121 is 12100211122221.

12222111200121 is a `hidden beast` number, since 12 + 222 + 111 + 200 + 121 = 666.

It is an interprime number because it is at equal distance from previous prime (12222111200113) and next prime (12222111200129).

It can be written as a sum of positive squares in 8 ways, for example, as 858706168896 + 11363405031225 = 926664^2 + 3370965^2 .

It is not a de Polignac number, because 12222111200121 - 2³ = 12222111200113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12222111200094 and 12222111200103.

It is not an unprimeable number, because it can be changed into a prime (12222111200129) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5587096 + ... + 7460553.

It is an arithmetic number, because the mean of its divisors is an integer number (394789269875).

Almost surely, 2^{12222111200121} is an apocalyptic number.

It is an amenable number.

12222111200121 is a deficient number, since it is larger than the sum of its proper divisors (6727773753879).

12222111200121 is a wasteful number, since it uses less digits than its factorization.

12222111200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13047818 (or 13047815 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12222111200121 its reverse (12100211122221), we get a palindrome (24322322322342).

The spelling of 12222111200121 in words is "twelve trillion, two hundred twenty-two billion, one hundred eleven million, two hundred thousand, one hundred twenty-one".