231100031100 has 144 divisors (see below), whose sum is σ = 680677683840. Its totient is φ = 60521260800.

The previous prime is 231100031047. The next prime is 231100031219. The reversal of 231100031100 is 1130001132.

231100031100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 12050119 + ... + 12069281.

It is an arithmetic number, because the mean of its divisors is an integer number (4726928360).

Almost surely, 2^231100031100 is an apocalyptic number.

231100031100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231100031100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (340338841920).

231100031100 is an abundant number, since it is smaller than the sum of its proper divisors (449577652740).

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

231100031100 is a wasteful number, since it uses less digits than its factorization.

231100031100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19900 (or 19893 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 231100031100 its reverse (1130001132), we get a palindrome (232230032232).

The spelling of 231100031100 in words is "two hundred thirty-one billion, one hundred million, thirty-one thousand, one hundred".