212000121211100 has 72 divisors (see below), whose sum is σ = 464618792994048. Its totient is φ = 83956165408000.

The previous prime is 212000121211093. The next prime is 212000121211141. The reversal of 212000121211100 is 1112121000212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 201444869 + ... + 202494531.

It is an arithmetic number, because the mean of its divisors is an integer number (6453038791584).

Almost surely, 2^{212000121211100} is an apocalyptic number.

212000121211100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212000121211100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232309396497024).

212000121211100 is an abundant number, since it is smaller than the sum of its proper divisors (252618671782948).

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

212000121211100 is a wasteful number, since it uses less digits than its factorization.

212000121211100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069775 (or 1069768 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 212000121211100 its reverse (1112121000212), we get a palindrome (213112242211312).

The spelling of 212000121211100 in words is "two hundred twelve trillion, one hundred twenty-one million, two hundred eleven thousand, one hundred".