12112111221210 has 576 divisors, whose sum is σ = 44200575828864. Its totient is φ = 2260408550400.

The previous prime is 12112111221191. The next prime is 12112111221233. The reversal of 12112111221210 is 1212211121121.

It is a happy number.

12112111221210 is a `hidden beast` number, since 1 + 21 + 1 + 211 + 1 + 221 + 210 = 666.

It is a super-2 number, since 2×12112111221210² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 23073765 + ... + 23592855.

It is an arithmetic number, because the mean of its divisors is an integer number (76737110814).

Almost surely, 2^{12112111221210} is an apocalyptic number.

12112111221210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12112111221210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22100287914432).

12112111221210 is an abundant number, since it is smaller than the sum of its proper divisors (32088464607654).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12112111221210 is a wasteful number, since it uses less digits than its factorization.

12112111221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519179 (or 519169 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 12112111221210 its reverse (1212211121121), we get a palindrome (13324322342331).

It can be divided in two parts, 12112111 and 221210, that added together give a palindrome (12333321).

The spelling of 12112111221210 in words is "twelve trillion, one hundred twelve billion, one hundred eleven million, two hundred twenty-one thousand, two hundred ten".