1200020003112 has 256 divisors, whose sum is σ = 3618191462400. Its totient is φ = 324256204800.

The previous prime is 1200020003081. The next prime is 1200020003131. The reversal of 1200020003112 is 2113000200021.

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

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 63 ways as a sum of consecutive naturals, for example, 235249362 + ... + 235254462.

It is an arithmetic number, because the mean of its divisors is an integer number (14133560400).

Almost surely, 2^{1200020003112} is an apocalyptic number.

1200020003112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1200020003112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1809095731200).

1200020003112 is an abundant number, since it is smaller than the sum of its proper divisors (2418171459288).

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

1200020003112 is a wasteful number, since it uses less digits than its factorization.

1200020003112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5816 (or 5812 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 1200020003112 its reverse (2113000200021), we get a palindrome (3313020203133).

The spelling of 1200020003112 in words is "one trillion, two hundred billion, twenty million, three thousand, one hundred twelve".