212100221133 has 48 divisors (see below), whose sum is σ = 320581497600. Its totient is φ = 135006106752.

The previous prime is 212100221119. The next prime is 212100221171. The reversal of 212100221133 is 331122001212.

212100221133 is a `hidden beast` number, since 212 + 100 + 221 + 133 = 666.

It is not a de Polignac number, because 212100221133 - 2⁵ = 212100221101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212100221533) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4092460 + ... + 4143962.

It is an arithmetic number, because the mean of its divisors is an integer number (6678781200).

Almost surely, 2^212100221133 is an apocalyptic number.

It is an amenable number.

212100221133 is a deficient number, since it is larger than the sum of its proper divisors (108481276467).

212100221133 is a wasteful number, since it uses less digits than its factorization.

212100221133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51778 (or 51775 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 212100221133 its reverse (331122001212), we get a palindrome (543222222345).

The spelling of 212100221133 in words is "two hundred twelve billion, one hundred million, two hundred twenty-one thousand, one hundred thirty-three".