212120021102112 has 144 divisors (see below), whose sum is σ = 618976594766880. Its totient is φ = 70673180980608.

The previous prime is 212120021102051. The next prime is 212120021102113. The reversal of 212120021102112 is 211201120021212.

212120021102112 is a `hidden beast` number, since 21 + 21 + 200 + 211 + 0 + 211 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

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

It is not an unprimeable number, because it can be changed into a prime (212120021102113) 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, 4193147283 + ... + 4193197869.

It is an arithmetic number, because the mean of its divisors is an integer number (4298448574770).

Almost surely, 2^{212120021102112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212120021102112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309488297383440).

212120021102112 is an abundant number, since it is smaller than the sum of its proper divisors (406856573664768).

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

212120021102112 is an frugal number, since it uses more digits than its factorization.

212120021102112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55012 (or 52795 counting only the distinct ones).

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

Adding to 212120021102112 its reverse (211201120021212), we get a palindrome (423321141123324).

The spelling of 212120021102112 in words is "two hundred twelve trillion, one hundred twenty billion, twenty-one million, one hundred two thousand, one hundred twelve".