111221122112209 has 4 divisors (see below), whose sum is σ = 117763541060004. Its totient is φ = 104678703164416.

The previous prime is 111221122112203. The next prime is 111221122112213. The reversal of 111221122112209 is 902211221122111.

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 84856522297600 + 26364599814609 = 9211760^2 + 5134647^2 .

It is a cyclic number.

It is not a de Polignac number, because 111221122112209 - 2⁷ = 111221122112081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111221122112203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3271209473872 + ... + 3271209473905.

It is an arithmetic number, because the mean of its divisors is an integer number (29440885265001).

Almost surely, 2^{111221122112209} is an apocalyptic number.

It is an amenable number.

111221122112209 is a deficient number, since it is larger than the sum of its proper divisors (6542418947795).

111221122112209 is an equidigital number, since it uses as much as digits as its factorization.

111221122112209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6542418947794.

The product of its (nonzero) digits is 576, while the sum is 28.

The spelling of 111221122112209 in words is "one hundred eleven trillion, two hundred twenty-one billion, one hundred twenty-two million, one hundred twelve thousand, two hundred nine".