12021200118 has 40 divisors (see below), whose sum is σ = 27865244880. Its totient is φ = 3868890480.

The previous prime is 12021200111. The next prime is 12021200161. The reversal of 12021200118 is 81100212021.

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

It is a self number, because there is not a number n which added to its sum of digits gives 12021200118.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021200111) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1274698 + ... + 1284093.

It is an arithmetic number, because the mean of its divisors is an integer number (696631122).

Almost surely, 2^12021200118 is an apocalyptic number.

12021200118 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12021200118 is an abundant number, since it is smaller than the sum of its proper divisors (15844044762).

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

12021200118 is a wasteful number, since it uses less digits than its factorization.

12021200118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2558834 (or 2558825 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12021200118 its reverse (81100212021), we get a palindrome (93121412139).

The spelling of 12021200118 in words is "twelve billion, twenty-one million, two hundred thousand, one hundred eighteen".