221120202221 has 8 divisors (see below), whose sum is σ = 221743584384. Its totient is φ = 220496934240.

The previous prime is 221120202181. The next prime is 221120202227. The reversal of 221120202221 is 122202021122.

It is a happy number.

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 221120202221 - 2³⁰ = 220046460397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221120202221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221120202227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5172866 + ... + 5215436.

It is an arithmetic number, because the mean of its divisors is an integer number (27717948048).

Almost surely, 2^221120202221 is an apocalyptic number.

It is an amenable number.

221120202221 is a deficient number, since it is larger than the sum of its proper divisors (623382163).

221120202221 is a wasteful number, since it uses less digits than its factorization.

221120202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57091.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 221120202221 its reverse (122202021122), we get a palindrome (343322223343).

The spelling of 221120202221 in words is "two hundred twenty-one billion, one hundred twenty million, two hundred two thousand, two hundred twenty-one".