12021211121200 has 60 divisors (see below), whose sum is σ = 28897493144200. Its totient is φ = 4805731745280.

The previous prime is 12021211121197. The next prime is 12021211121207. The reversal of 12021211121200 is 212111212021.

It is a super-2 number, since 2×12021211121200² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (12021211121207) 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, 7902525 + ... + 9300124.

Almost surely, 2^{12021211121200} is an apocalyptic number.

12021211121200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021211121200 is an abundant number, since it is smaller than the sum of its proper divisors (16876282023000).

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

12021211121200 is a wasteful number, since it uses less digits than its factorization.

12021211121200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17204414 (or 17204403 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12021211121200 its reverse (212111212021), we get a palindrome (12233322333221).

The spelling of 12021211121200 in words is "twelve trillion, twenty-one billion, two hundred eleven million, one hundred twenty-one thousand, two hundred".