221231213333 has 4 divisors (see below), whose sum is σ = 238248998988. Its totient is φ = 204213427680.

The previous prime is 221231213317. The next prime is 221231213339. The reversal of 221231213333 is 333312132122.

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 58807705009 + 162423508324 = 242503^2 + 403018^2 .

It is a cyclic number.

It is not a de Polignac number, because 221231213333 - 2⁴ = 221231213317 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221231213339) 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, 8508892808 + ... + 8508892833.

It is an arithmetic number, because the mean of its divisors is an integer number (59562249747).

Almost surely, 2^221231213333 is an apocalyptic number.

It is an amenable number.

221231213333 is a deficient number, since it is larger than the sum of its proper divisors (17017785655).

221231213333 is a wasteful number, since it uses less digits than its factorization.

221231213333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17017785654.

The product of its digits is 3888, while the sum is 26.

Adding to 221231213333 its reverse (333312132122), we get a palindrome (554543345455).

The spelling of 221231213333 in words is "two hundred twenty-one billion, two hundred thirty-one million, two hundred thirteen thousand, three hundred thirty-three".