12200121022221 has 12 divisors (see below), whose sum is σ = 19224433126080. Its totient is φ = 7394012740680.

The previous prime is 12200121022217. The next prime is 12200121022223. The reversal of 12200121022221 is 12222012100221.

It is a happy number.

12200121022221 is a `hidden beast` number, since 12 + 200 + 1 + 210 + 22 + 221 = 666.

12200121022221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12200121022221 - 2² = 12200121022217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12200121022194 and 12200121022203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12200121022223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61616772741 + ... + 61616772938.

It is an arithmetic number, because the mean of its divisors is an integer number (1602036093840).

Almost surely, 2^{12200121022221} is an apocalyptic number.

12200121022221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12200121022221 is a deficient number, since it is larger than the sum of its proper divisors (7024312103859).

12200121022221 is a wasteful number, since it uses less digits than its factorization.

12200121022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123233545696 (or 123233545693 counting only the distinct ones).

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

Adding to 12200121022221 its reverse (12222012100221), we get a palindrome (24422133122442).

The spelling of 12200121022221 in words is "twelve trillion, two hundred billion, one hundred twenty-one million, twenty-two thousand, two hundred twenty-one".