12345031100 has 36 divisors (see below), whose sum is σ = 28364528304. Its totient is φ = 4647540480.

The previous prime is 12345031091. The next prime is 12345031133. The reversal of 12345031100 is 113054321.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3629192 + ... + 3632591.

It is an arithmetic number, because the mean of its divisors is an integer number (787903564).

Almost surely, 2^12345031100 is an apocalyptic number.

12345031100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12345031100 is an abundant number, since it is smaller than the sum of its proper divisors (16019497204).

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

12345031100 is a wasteful number, since it uses less digits than its factorization.

12345031100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7261814 (or 7261807 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 12345031100 its reverse (113054321), we get a palindrome (12458085421).

The spelling of 12345031100 in words is "twelve billion, three hundred forty-five million, thirty-one thousand, one hundred".