12111212200000 has 84 divisors (see below), whose sum is σ = 30039561227844. Its totient is φ = 4844484800000.

The previous prime is 12111212199973. The next prime is 12111212200019. The reversal of 12111212200000 is 221211121.

It can be written as a sum of positive squares in 6 ways, for example, as 5767221462016 + 6343990737984 = 2401504^2 + 2518728^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30078031 + ... + 30478030.

It is an arithmetic number, because the mean of its divisors is an integer number (357613824141).

Almost surely, 2^{12111212200000} is an apocalyptic number.

12111212200000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12111212200000 is an abundant number, since it is smaller than the sum of its proper divisors (17928349027844).

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

12111212200000 is an frugal number, since it uses more digits than its factorization.

12111212200000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60556098 (or 60556068 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12111212200000 its reverse (221211121), we get a palindrome (12111433411121).

The spelling of 12111212200000 in words is "twelve trillion, one hundred eleven billion, two hundred twelve million, two hundred thousand".