111122120121211 has 4 divisors (see below), whose sum is σ = 114953917366800. Its totient is φ = 107290322875624.

The previous prime is 111122120121191. The next prime is 111122120121227. The reversal of 111122120121211 is 112121021221111.

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

It is not a de Polignac number, because 111122120121211 - 2⁵ = 111122120121179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111122120128211) 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, 1915898622751 + ... + 1915898622808.

It is an arithmetic number, because the mean of its divisors is an integer number (28738479341700).

Almost surely, 2^{111122120121211} is an apocalyptic number.

111122120121211 is a deficient number, since it is larger than the sum of its proper divisors (3831797245589).

111122120121211 is an equidigital number, since it uses as much as digits as its factorization.

111122120121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3831797245588.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 111122120121211 its reverse (112121021221111), we get a palindrome (223243141342322).

The spelling of 111122120121211 in words is "one hundred eleven trillion, one hundred twenty-two billion, one hundred twenty million, one hundred twenty-one thousand, two hundred eleven".