12131201100 has 72 divisors (see below), whose sum is σ = 36048279568. Its totient is φ = 3147552000.

The previous prime is 12131201099. The next prime is 12131201143. The reversal of 12131201100 is 110213121.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 535351 + ... + 557550.

Almost surely, 2^12131201100 is an apocalyptic number.

12131201100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12131201100 is an abundant number, since it is smaller than the sum of its proper divisors (23917078468).

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

12131201100 is a wasteful number, since it uses less digits than its factorization.

12131201100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092955 (or 1092948 counting only the distinct ones).

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

Adding to 12131201100 its reverse (110213121), we get a palindrome (12241414221).

The spelling of 12131201100 in words is "twelve billion, one hundred thirty-one million, two hundred one thousand, one hundred".