211311031133 has 4 divisors (see below), whose sum is σ = 211519631388. Its totient is φ = 211102430880.

The previous prime is 211311031081. The next prime is 211311031147. The reversal of 211311031133 is 331130113112.

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 89313115609 + 121997915524 = 298853^2 + 349282^2 .

It is a cyclic number.

It is not a de Polignac number, because 211311031133 - 2¹⁰ = 211311030109 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 (211311031163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104298608 + ... + 104300633.

It is an arithmetic number, because the mean of its divisors is an integer number (52879907847).

Almost surely, 2^211311031133 is an apocalyptic number.

It is an amenable number.

211311031133 is a deficient number, since it is larger than the sum of its proper divisors (208600255).

211311031133 is a wasteful number, since it uses less digits than its factorization.

211311031133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208600254.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 211311031133 its reverse (331130113112), we get a palindrome (542441144245).

The spelling of 211311031133 in words is "two hundred eleven billion, three hundred eleven million, thirty-one thousand, one hundred thirty-three".