211332303221 has 8 divisors (see below), whose sum is σ = 227854210584. Its totient is φ = 194848335360.

The previous prime is 211332303163. The next prime is 211332303239. The reversal of 211332303221 is 122303233112.

It can be written as a sum of positive squares in 4 ways, for example, as 80364312196 + 130967991025 = 283486^2 + 361895^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211332303221 - 2⁶ = 211332303157 is a prime.

It is a super-2 number, since 2×211332303221² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211332333221) 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 7 ways as a sum of consecutive naturals, for example, 9473300 + ... + 9495581.

It is an arithmetic number, because the mean of its divisors is an integer number (28481776323).

Almost surely, 2^211332303221 is an apocalyptic number.

It is an amenable number.

211332303221 is a deficient number, since it is larger than the sum of its proper divisors (16521907363).

211332303221 is a wasteful number, since it uses less digits than its factorization.

211332303221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18969751.

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

Adding to 211332303221 its reverse (122303233112), we get a palindrome (333635536333).

The spelling of 211332303221 in words is "two hundred eleven billion, three hundred thirty-two million, three hundred three thousand, two hundred twenty-one".