221102301221 has 4 divisors (see below), whose sum is σ = 221466556032. Its totient is φ = 220738046412.

The previous prime is 221102301139. The next prime is 221102301239. The reversal of 221102301221 is 122103201122.

221102301221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221102301221 - 2³⁰ = 220028559397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221102301221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221102301521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182126495 + ... + 182127708.

It is an arithmetic number, because the mean of its divisors is an integer number (55366639008).

Almost surely, 2^221102301221 is an apocalyptic number.

It is an amenable number.

221102301221 is a deficient number, since it is larger than the sum of its proper divisors (364254811).

221102301221 is an equidigital number, since it uses as much as digits as its factorization.

221102301221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364254810.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 221102301221 its reverse (122103201122), we get a palindrome (343205502343).

The spelling of 221102301221 in words is "two hundred twenty-one billion, one hundred two million, three hundred one thousand, two hundred twenty-one".