123231100 has 36 divisors (see below), whose sum is σ = 269215408. Its totient is φ = 48960000.

The previous prime is 123231047. The next prime is 123231103. The reversal of 123231100 is 1132321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123231103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11020 + ... + 19180.

Almost surely, 2^123231100 is an apocalyptic number.

123231100 is a gapful number since it is divisible by the number (10) 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 123231100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134607704).

123231100 is an abundant number, since it is smaller than the sum of its proper divisors (145984308).

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

123231100 is a wasteful number, since it uses less digits than its factorization.

123231100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8326 (or 8319 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 123231100 is about 11100.9504097622. The cubic root of 123231100 is about 497.6302530088.

Adding to 123231100 its reverse (1132321), we get a palindrome (124363421).

The spelling of 123231100 in words is "one hundred twenty-three million, two hundred thirty-one thousand, one hundred".