12112200211221 has 80 divisors (see below), whose sum is σ = 20804301999360. Its totient is φ = 6953869802880.

The previous prime is 12112200211219. The next prime is 12112200211229. The reversal of 12112200211221 is 12211200221121.

12112200211221 is a `hidden beast` number, since 1 + 2 + 11 + 220 + 0 + 211 + 221 = 666.

It is not a de Polignac number, because 12112200211221 - 2¹ = 12112200211219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12112200211194 and 12112200211203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12112200211229) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3052765 + ... + 5791698.

It is an arithmetic number, because the mean of its divisors is an integer number (260053774992).

Almost surely, 2^{12112200211221} is an apocalyptic number.

12112200211221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12112200211221 is a deficient number, since it is larger than the sum of its proper divisors (8692101788139).

12112200211221 is a wasteful number, since it uses less digits than its factorization.

12112200211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8844568 (or 8844559 counting only the distinct ones).

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

Adding to 12112200211221 its reverse (12211200221121), we get a palindrome (24323400432342).

The spelling of 12112200211221 in words is "twelve trillion, one hundred twelve billion, two hundred million, two hundred eleven thousand, two hundred twenty-one".