212101200000 has 768 divisors, whose sum is σ = 803198592000. Its totient is φ = 55065600000.

The previous prime is 212101199993. The next prime is 212101200001. The reversal of 212101200000 is 2101212.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (212101200001) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 442799761 + ... + 442800239.

It is an arithmetic number, because the mean of its divisors is an integer number (1045831500).

Almost surely, 2^212101200000 is an apocalyptic number.

212101200000 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 212101200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (401599296000).

212101200000 is an abundant number, since it is smaller than the sum of its proper divisors (591097392000).

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

212101200000 is an frugal number, since it uses more digits than its factorization.

212101200000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568 (or 530 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 212101200000 its reverse (2101212), we get a palindrome (212103301212).

The spelling of 212101200000 in words is "two hundred twelve billion, one hundred one million, two hundred thousand".