111231320211 has 24 divisors (see below), whose sum is σ = 182894190336. Its totient is φ = 64481923440.

The previous prime is 111231320191. The next prime is 111231320237. The reversal of 111231320211 is 112023132111.

111231320211 is a `hidden beast` number, since 11 + 123 + 1 + 320 + 211 = 666.

It is not a de Polignac number, because 111231320211 - 2¹⁸ = 111231058067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111231320281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24422695 + ... + 24427248.

It is an arithmetic number, because the mean of its divisors is an integer number (7620591264).

Almost surely, 2^111231320211 is an apocalyptic number.

111231320211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111231320211 is a deficient number, since it is larger than the sum of its proper divisors (71662870125).

111231320211 is a wasteful number, since it uses less digits than its factorization.

111231320211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48849983 (or 48849980 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 111231320211 its reverse (112023132111), we get a palindrome (223254452322).

The spelling of 111231320211 in words is "one hundred eleven billion, two hundred thirty-one million, three hundred twenty thousand, two hundred eleven".