212100002221100 has 54 divisors (see below), whose sum is σ = 535401005619060. Its totient is φ = 72720000759840.

The previous prime is 212100002221067. The next prime is 212100002221231. The reversal of 212100002221100 is 1122200001212.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 21642852470 + ... + 21642862269.

It is an arithmetic number, because the mean of its divisors is an integer number (9914833437390).

Almost surely, 2^{212100002221100} is an apocalyptic number.

212100002221100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212100002221100 is an abundant number, since it is smaller than the sum of its proper divisors (323301003397960).

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

212100002221100 is a wasteful number, since it uses less digits than its factorization.

212100002221100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43285714767 (or 43285714753 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 212100002221100 its reverse (1122200001212), we get a palindrome (213222202222312).

The spelling of 212100002221100 in words is "two hundred twelve trillion, one hundred billion, two million, two hundred twenty-one thousand, one hundred".