231112100 has 72 divisors (see below), whose sum is σ = 521091648. Its totient is φ = 88905600.

The previous prime is 231112081. The next prime is 231112109. The reversal of 231112100 is 1211132.

It is not an unprimeable number, because it can be changed into a prime (231112109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 304922 + ... + 305678.

It is an arithmetic number, because the mean of its divisors is an integer number (7237384).

Almost surely, 2^231112100 is an apocalyptic number.

231112100 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 231112100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260545824).

231112100 is an abundant number, since it is smaller than the sum of its proper divisors (289979548).

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

231112100 is a wasteful number, since it uses less digits than its factorization.

231112100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885 (or 878 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 231112100 is about 15202.3715255219. The cubic root of 231112100 is about 613.6784807772.

Adding to 231112100 its reverse (1211132), we get a palindrome (232323232).

The spelling of 231112100 in words is "two hundred thirty-one million, one hundred twelve thousand, one hundred".