221221200033 has 16 divisors (see below), whose sum is σ = 338307212800. Its totient is φ = 142723354320.

The previous prime is 221221200001. The next prime is 221221200037. The reversal of 221221200033 is 330002122122.

It is not a de Polignac number, because 221221200033 - 2⁵ = 221221200001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221221199979 and 221221200015.

It is not an unprimeable number, because it can be changed into a prime (221221200037) 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 15 ways as a sum of consecutive naturals, for example, 132150418 + ... + 132152091.

It is an arithmetic number, because the mean of its divisors is an integer number (21144200800).

Almost surely, 2^221221200033 is an apocalyptic number.

It is an amenable number.

221221200033 is a deficient number, since it is larger than the sum of its proper divisors (117086012767).

221221200033 is a wasteful number, since it uses less digits than its factorization.

221221200033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264302549 (or 264302543 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 221221200033 its reverse (330002122122), we get a palindrome (551223322155).

The spelling of 221221200033 in words is "two hundred twenty-one billion, two hundred twenty-one million, two hundred thousand, thirty-three".