12012121200 has 60 divisors (see below), whose sum is σ = 38478832088. Its totient is φ = 3203232000.

The previous prime is 12012121109. The next prime is 12012121201. The reversal of 12012121200 is 212121021.

It is a tau number, because it is divible by the number of its divisors (60).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012121201) 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 11 ways as a sum of consecutive naturals, for example, 5003851 + ... + 5006250.

Almost surely, 2^12012121200 is an apocalyptic number.

12012121200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12012121200 is an abundant number, since it is smaller than the sum of its proper divisors (26466710888).

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

12012121200 is a wasteful number, since it uses less digits than its factorization.

12012121200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10010122 (or 10010111 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12012121200 its reverse (212121021), we get a palindrome (12224242221).

The spelling of 12012121200 in words is "twelve billion, twelve million, one hundred twenty-one thousand, two hundred".