211021231033 has 4 divisors (see below), whose sum is σ = 215002763748. Its totient is φ = 207039698320.

The previous prime is 211021231021. The next prime is 211021231049. The reversal of 211021231033 is 330132120112.

211021231033 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 181465776144 + 29555454889 = 425988^2 + 171917^2 .

It is a cyclic number.

It is not a de Polignac number, because 211021231033 - 2²¹ = 211019133881 is a prime.

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 211021231033.

It is not an unprimeable number, because it can be changed into a prime (211021231063) 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, 1990766278 + ... + 1990766383.

It is an arithmetic number, because the mean of its divisors is an integer number (53750690937).

Almost surely, 2^211021231033 is an apocalyptic number.

It is an amenable number.

211021231033 is a deficient number, since it is larger than the sum of its proper divisors (3981532715).

211021231033 is an equidigital number, since it uses as much as digits as its factorization.

211021231033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3981532714.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 211021231033 its reverse (330132120112), we get a palindrome (541153351145).

The spelling of 211021231033 in words is "two hundred eleven billion, twenty-one million, two hundred thirty-one thousand, thirty-three".