111221310211 has 32 divisors (see below), whose sum is σ = 130258471680. Its totient is φ = 93887164800.

The previous prime is 111221310199. The next prime is 111221310241. The reversal of 111221310211 is 112013122111.

It is a happy number.

It is not a de Polignac number, because 111221310211 - 2²⁵ = 111187755779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111221310241) 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 31 ways as a sum of consecutive naturals, for example, 12435001 + ... + 12443941.

It is an arithmetic number, because the mean of its divisors is an integer number (4070577240).

Almost surely, 2^111221310211 is an apocalyptic number.

111221310211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111221310211 is a deficient number, since it is larger than the sum of its proper divisors (19037161469).

111221310211 is a wasteful number, since it uses less digits than its factorization.

111221310211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10147.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 111221310211 its reverse (112013122111), we get a palindrome (223234432322).

The spelling of 111221310211 in words is "one hundred eleven billion, two hundred twenty-one million, three hundred ten thousand, two hundred eleven".