1200001220000 has 240 divisors, whose sum is σ = 3234762669600. Its totient is φ = 434440320000.

The previous prime is 1200001219933. The next prime is 1200001220023. The reversal of 1200001220000 is 221000021.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1200001220000.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 50368091 + ... + 50391909.

It is an arithmetic number, because the mean of its divisors is an integer number (13478177790).

Almost surely, 2^{1200001220000} is an apocalyptic number.

1200001220000 is a gapful number since it is divisible by the number (10) 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 1200001220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1617381334800).

1200001220000 is an abundant number, since it is smaller than the sum of its proper divisors (2034761449600).

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

1200001220000 is a wasteful number, since it uses less digits than its factorization.

1200001220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24089 (or 24066 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 1200001220000 its reverse (221000021), we get a palindrome (1200222220021).

The spelling of 1200001220000 in words is "one trillion, two hundred billion, one million, two hundred twenty thousand".