111101221009 has 4 divisors (see below), whose sum is σ = 113197470516. Its totient is φ = 109004971504.

The previous prime is 111101221003. The next prime is 111101221019. The reversal of 111101221009 is 900122101111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59891793984 + 51209427025 = 244728^2 + 226295^2 .

It is a cyclic number.

It is not a de Polignac number, because 111101221009 - 2³ = 111101221001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111101221001) 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 3 ways as a sum of consecutive naturals, for example, 1048124674 + ... + 1048124779.

It is an arithmetic number, because the mean of its divisors is an integer number (28299367629).

Almost surely, 2^111101221009 is an apocalyptic number.

It is an amenable number.

111101221009 is a deficient number, since it is larger than the sum of its proper divisors (2096249507).

111101221009 is an equidigital number, since it uses as much as digits as its factorization.

111101221009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2096249506.

The product of its (nonzero) digits is 36, while the sum is 19.

The spelling of 111101221009 in words is "one hundred eleven billion, one hundred one million, two hundred twenty-one thousand, nine".