1200121221112 has 64 divisors (see below), whose sum is σ = 2462511340800. Its totient is φ = 543797280000.

The previous prime is 1200121221109. The next prime is 1200121221137. The reversal of 1200121221112 is 2111221210021.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36529189 + ... + 36562027.

It is an arithmetic number, because the mean of its divisors is an integer number (38476739700).

Almost surely, 2^{1200121221112} is an apocalyptic number.

It is an amenable number.

1200121221112 is an abundant number, since it is smaller than the sum of its proper divisors (1262390119688).

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

1200121221112 is a wasteful number, since it uses less digits than its factorization.

1200121221112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34148 (or 34144 counting only the distinct ones).

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

Adding to 1200121221112 its reverse (2111221210021), we get a palindrome (3311342431133).

The spelling of 1200121221112 in words is "one trillion, two hundred billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred twelve".