231111020112 has 40 divisors (see below), whose sum is σ = 682327774656. Its totient is φ = 66031719936.

The previous prime is 231111020089. The next prime is 231111020117. The reversal of 231111020112 is 211020111132.

231111020112 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 231111020091 and 231111020100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231111020117) 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 7 ways as a sum of consecutive naturals, for example, 343914873 + ... + 343915544.

Almost surely, 2^231111020112 is an apocalyptic number.

It is an amenable number.

231111020112 is an abundant number, since it is smaller than the sum of its proper divisors (451216754544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231111020112 is a wasteful number, since it uses less digits than its factorization.

231111020112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687830435 (or 687830429 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 231111020112 its reverse (211020111132), we get a palindrome (442131131244).

It can be divided in two parts, 231111020 and 112, that added together give a palindrome (231111132).

The spelling of 231111020112 in words is "two hundred thirty-one billion, one hundred eleven million, twenty thousand, one hundred twelve".