212100000020000 has 120 divisors (see below), whose sum is σ = 533932650122256. Its totient is φ = 82866976416000.

The previous prime is 212100000019981. The next prime is 212100000020003. The reversal of 212100000020000 is 20000001212.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a self number, because there is not a number n which added to its sum of digits gives 212100000020000.

It is not an unprimeable number, because it can be changed into a prime (212100000020003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 122453954 + ... + 124173953.

Almost surely, 2^{212100000020000} is an apocalyptic number.

212100000020000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212100000020000 is an abundant number, since it is smaller than the sum of its proper divisors (321832650102256).

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

212100000020000 is an equidigital number, since it uses as much as digits as its factorization.

212100000020000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246627980 (or 246627957 counting only the distinct ones).

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

Adding to 212100000020000 its reverse (20000001212), we get a palindrome (212120000021212).

The spelling of 212100000020000 in words is "two hundred twelve trillion, one hundred billion, twenty thousand".