212133330123021 has 12 divisors (see below), whose sum is σ = 307521000831772. Its totient is φ = 140911670549376.

The previous prime is 212133330122981. The next prime is 212133330123101. The reversal of 212133330123021 is 120321033331212.

212133330123021 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 333 + 301 + 2 + 3 + 0 + 21 = 666.

212133330123021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 21407148689796 + 190726181433225 = 4626786^2 + 13810365^2 .

It is not a de Polignac number, because 212133330123021 - 2¹⁰ = 212133330121997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212133330127021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42545791756 + ... + 42545796741.

Almost surely, 2^{212133330123021} is an apocalyptic number.

It is an amenable number.

212133330123021 is a deficient number, since it is larger than the sum of its proper divisors (95387670708751).

212133330123021 is a wasteful number, since it uses less digits than its factorization.

212133330123021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85091588780 (or 85091588777 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 212133330123021 its reverse (120321033331212), we get a palindrome (332454363454233).

The spelling of 212133330123021 in words is "two hundred twelve trillion, one hundred thirty-three billion, three hundred thirty million, one hundred twenty-three thousand, twenty-one".