12042720198 has 40 divisors (see below), whose sum is σ = 27011111688. Its totient is φ = 4010298336.

The previous prime is 12042720191. The next prime is 12042720227. The reversal of 12042720198 is 89102724021.

12042720198 is a `hidden beast` number, since 1 + 20 + 427 + 20 + 198 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12042720191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 131365 + ... + 203327.

Almost surely, 2^12042720198 is an apocalyptic number.

12042720198 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12042720198 is an abundant number, since it is smaller than the sum of its proper divisors (14968391490).

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

12042720198 is a wasteful number, since it uses less digits than its factorization.

12042720198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73010 (or 73001 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

It can be divided in two parts, 120427 and 20198, that added together give a square (140625 = 375²).

The spelling of 12042720198 in words is "twelve billion, forty-two million, seven hundred twenty thousand, one hundred ninety-eight".