221333333121 has 48 divisors (see below), whose sum is σ = 323582953408. Its totient is φ = 145779004800.

The previous prime is 221333333107. The next prime is 221333333141. The reversal of 221333333121 is 121333333122.

221333333121 is a `hidden beast` number, since 2 + 2 + 13 + 3 + 333 + 312 + 1 = 666.

It is not a de Polignac number, because 221333333121 - 2¹¹ = 221333331073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221333333141) 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 47 ways as a sum of consecutive naturals, for example, 320308386 + ... + 320309076.

Almost surely, 2^221333333121 is an apocalyptic number.

It is an amenable number.

221333333121 is a deficient number, since it is larger than the sum of its proper divisors (102249620287).

221333333121 is a wasteful number, since it uses less digits than its factorization.

221333333121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1822 (or 1819 counting only the distinct ones).

The product of its digits is 5832, while the sum is 27.

Adding to 221333333121 its reverse (121333333122), we get a palindrome (342666666243).

Subtracting from 221333333121 its reverse (121333333122), we obtain a palindrome (99999999999).

The spelling of 221333333121 in words is "two hundred twenty-one billion, three hundred thirty-three million, three hundred thirty-three thousand, one hundred twenty-one".