211320221333 has 16 divisors (see below), whose sum is σ = 228073282416. Its totient is φ = 194638679040.

The previous prime is 211320221317. The next prime is 211320221341. The reversal of 211320221333 is 333122023112.

It can be written as a sum of positive squares in 8 ways, for example, as 10882245124 + 200437976209 = 104318^2 + 447703^2 .

It is not a de Polignac number, because 211320221333 - 2⁴ = 211320221317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211320221299 and 211320221308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211320221393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13660223 + ... + 13675683.

It is an arithmetic number, because the mean of its divisors is an integer number (14254580151).

Almost surely, 2^211320221333 is an apocalyptic number.

It is an amenable number.

211320221333 is a deficient number, since it is larger than the sum of its proper divisors (16753061083).

211320221333 is a wasteful number, since it uses less digits than its factorization.

211320221333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17704.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 211320221333 its reverse (333122023112), we get a palindrome (544442244445).

The spelling of 211320221333 in words is "two hundred eleven billion, three hundred twenty million, two hundred twenty-one thousand, three hundred thirty-three".