12222001120221 has 6 divisors (see below), whose sum is σ = 17654001618110. Its totient is φ = 8148000746808.

The previous prime is 12222001120183. The next prime is 12222001120223. The reversal of 12222001120221 is 12202110022221.

It is a happy number.

12222001120221 is a `hidden beast` number, since 1 + 222 + 200 + 1 + 1 + 20 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12180176780121 + 41824340100 = 3490011^2 + 204510^2 .

It is not a de Polignac number, because 12222001120221 - 2³⁹ = 11672245306333 is a prime.

It is a super-2 number, since 2×12222001120221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12222001120194 and 12222001120203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222001120223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 679000062226 + ... + 679000062243.

Almost surely, 2^{12222001120221} is an apocalyptic number.

It is an amenable number.

12222001120221 is a deficient number, since it is larger than the sum of its proper divisors (5432000497889).

12222001120221 is a wasteful number, since it uses less digits than its factorization.

12222001120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358000124475 (or 1358000124472 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12222001120221 its reverse (12202110022221), we get a palindrome (24424111142442).

The spelling of 12222001120221 in words is "twelve trillion, two hundred twenty-two billion, one million, one hundred twenty thousand, two hundred twenty-one".