12112011021221 has 8 divisors (see below), whose sum is σ = 12134240575200. Its totient is φ = 12089794614832.

The previous prime is 12112011021217. The next prime is 12112011021223. The reversal of 12112011021221 is 12212011021121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12112011021221 - 2² = 12112011021217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12112011021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12112011021223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1441790 + ... + 5128623.

It is an arithmetic number, because the mean of its divisors is an integer number (1516780071900).

Almost surely, 2^{12112011021221} is an apocalyptic number.

It is an amenable number.

12112011021221 is a deficient number, since it is larger than the sum of its proper divisors (22229553979).

12112011021221 is an equidigital number, since it uses as much as digits as its factorization.

12112011021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6573795.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12112011021221 its reverse (12212011021121), we get a palindrome (24324022042342).

The spelling of 12112011021221 in words is "twelve trillion, one hundred twelve billion, eleven million, twenty-one thousand, two hundred twenty-one".