212021121133 has 4 divisors (see below), whose sum is σ = 212093808700. Its totient is φ = 211948433568.

The previous prime is 212021121131. The next prime is 212021121139. The reversal of 212021121133 is 331121120212.

212021121133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 211391211529 + 629909604 = 459773^2 + 25098^2 .

It is a cyclic number.

It is not a de Polignac number, because 212021121133 - 2¹ = 212021121131 is a prime.

It is a super-3 number, since 3×212021121133³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212021121133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021121131) 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 3 ways as a sum of consecutive naturals, for example, 36339408 + ... + 36345241.

It is an arithmetic number, because the mean of its divisors is an integer number (53023452175).

Almost surely, 2^212021121133 is an apocalyptic number.

It is an amenable number.

212021121133 is a deficient number, since it is larger than the sum of its proper divisors (72687567).

212021121133 is an equidigital number, since it uses as much as digits as its factorization.

212021121133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72687566.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 212021121133 its reverse (331121120212), we get a palindrome (543142241345).

The spelling of 212021121133 in words is "two hundred twelve billion, twenty-one million, one hundred twenty-one thousand, one hundred thirty-three".