12122111200221 has 24 divisors (see below), whose sum is σ = 19617765551904. Its totient is φ = 7148173678560.

The previous prime is 12122111200211. The next prime is 12122111200249. The reversal of 12122111200221 is 12200211122121.

12122111200221 is a `hidden beast` number, since 1 + 21 + 221 + 1 + 1 + 200 + 221 = 666.

12122111200221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-12122111200221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12122111200194 and 12122111200203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122111200211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1654666171 + ... + 1654673496.

It is an arithmetic number, because the mean of its divisors is an integer number (817406897996).

Almost surely, 2^{12122111200221} is an apocalyptic number.

12122111200221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12122111200221 is a deficient number, since it is larger than the sum of its proper divisors (7495654351683).

12122111200221 is a wasteful number, since it uses less digits than its factorization.

12122111200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3309339721 (or 3309339718 counting only the distinct ones).

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

Adding to 12122111200221 its reverse (12200211122121), we get a palindrome (24322322322342).

The spelling of 12122111200221 in words is "twelve trillion, one hundred twenty-two billion, one hundred eleven million, two hundred thousand, two hundred twenty-one".