123231131100 has 648 divisors, whose sum is σ = 489131610240. Its totient is φ = 25400390400.

The previous prime is 123231131099. The next prime is 123231131123. The reversal of 123231131100 is 1131132321.

123231131100 is a `hidden beast` number, since 12 + 32 + 311 + 311 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 105959119 + ... + 105960281.

Almost surely, 2^123231131100 is an apocalyptic number.

123231131100 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 123231131100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244565805120).

123231131100 is an abundant number, since it is smaller than the sum of its proper divisors (365900479140).

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

123231131100 is a wasteful number, since it uses less digits than its factorization.

123231131100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351 (or 1330 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 123231131100 its reverse (1131132321), we get a palindrome (124362263421).

The spelling of 123231131100 in words is "one hundred twenty-three billion, two hundred thirty-one million, one hundred thirty-one thousand, one hundred".