221221102109 has 8 divisors (see below), whose sum is σ = 252845972928. Its totient is φ = 189601695360.

The previous prime is 221221102103. The next prime is 221221102183. The reversal of 221221102109 is 901201122122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221221102109 - 2¹² = 221221098013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221221102103) 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 7 ways as a sum of consecutive naturals, for example, 1278887 + ... + 1441524.

It is an arithmetic number, because the mean of its divisors is an integer number (31605746616).

Almost surely, 2^221221102109 is an apocalyptic number.

It is an amenable number.

221221102109 is a deficient number, since it is larger than the sum of its proper divisors (31624870819).

221221102109 is a wasteful number, since it uses less digits than its factorization.

221221102109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2732035.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 221221102109 in words is "two hundred twenty-one billion, two hundred twenty-one million, one hundred two thousand, one hundred nine".