12181227900 has 72 divisors (see below), whose sum is σ = 35279825280. Its totient is φ = 3245058240.

The previous prime is 12181227871. The next prime is 12181227907. The reversal of 12181227900 is 972218121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12181227907) 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, 285777 + ... + 325623.

Almost surely, 2^12181227900 is an apocalyptic number.

12181227900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12181227900 is an abundant number, since it is smaller than the sum of its proper divisors (23098597380).

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

12181227900 is a wasteful number, since it uses less digits than its factorization.

12181227900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40883 (or 40876 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 33.

The spelling of 12181227900 in words is "twelve billion, one hundred eighty-one million, two hundred twenty-seven thousand, nine hundred".