12121311200 has 36 divisors (see below), whose sum is σ = 29591152920. Its totient is φ = 4848524160.

The previous prime is 12121311179. The next prime is 12121311263. The reversal of 12121311200 is 211312121.

12121311200 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7575020 + ... + 7576619.

It is an arithmetic number, because the mean of its divisors is an integer number (821976470).

Almost surely, 2^12121311200 is an apocalyptic number.

12121311200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121311200 is an abundant number, since it is smaller than the sum of its proper divisors (17469841720).

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

12121311200 is a wasteful number, since it uses less digits than its factorization.

12121311200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15151659 (or 15151646 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 12121311200 its reverse (211312121), we get a palindrome (12332623321).

The spelling of 12121311200 in words is "twelve billion, one hundred twenty-one million, three hundred eleven thousand, two hundred".