211321133321 has 4 divisors (see below), whose sum is σ = 211542877332. Its totient is φ = 211099389312.

The previous prime is 211321133273. The next prime is 211321133327. The reversal of 211321133321 is 123331123112.

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 143231971600 + 68089161721 = 378460^2 + 260939^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211321133321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211321133327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110870576 + ... + 110872481.

It is an arithmetic number, because the mean of its divisors is an integer number (52885719333).

Almost surely, 2^211321133321 is an apocalyptic number.

It is an amenable number.

211321133321 is a deficient number, since it is larger than the sum of its proper divisors (221744011).

211321133321 is an equidigital number, since it uses as much as digits as its factorization.

211321133321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221744010.

The product of its digits is 648, while the sum is 23.

Adding to 211321133321 its reverse (123331123112), we get a palindrome (334652256433).

The spelling of 211321133321 in words is "two hundred eleven billion, three hundred twenty-one million, one hundred thirty-three thousand, three hundred twenty-one".