113111121211 has 16 divisors (see below), whose sum is σ = 123806757888. Its totient is φ = 102484720800.

The previous prime is 113111121187. The next prime is 113111121241. The reversal of 113111121211 is 112121111311.

It is not a de Polignac number, because 113111121211 - 2⁷ = 113111121083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (113111121241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5627766 + ... + 5647828.

It is an arithmetic number, because the mean of its divisors is an integer number (7737922368).

Almost surely, 2^113111121211 is an apocalyptic number.

113111121211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

113111121211 is a deficient number, since it is larger than the sum of its proper divisors (10695636677).

113111121211 is a wasteful number, since it uses less digits than its factorization.

113111121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21762.

The product of its digits is 12, while the sum is 16.

Adding to 113111121211 its reverse (112121111311), we get a palindrome (225232232522).

The spelling of 113111121211 in words is "one hundred thirteen billion, one hundred eleven million, one hundred twenty-one thousand, two hundred eleven".