1000120001200 has 120 divisors (see below), whose sum is σ = 2564875480320. Its totient is φ = 373654713600.

The previous prime is 1000120001191. The next prime is 1000120001203. The reversal of 1000120001200 is 21000210001.

It is not an unprimeable number, because it can be changed into a prime (1000120001203) 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 23 ways as a sum of consecutive naturals, for example, 387124 + ... + 1466323.

It is an arithmetic number, because the mean of its divisors is an integer number (21373962336).

Almost surely, 2^{1000120001200} is an apocalyptic number.

1000120001200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000120001200 is an abundant number, since it is smaller than the sum of its proper divisors (1564755479120).

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

1000120001200 is a wasteful number, since it uses less digits than its factorization.

1000120001200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853555 (or 1853544 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 1000120001200 its reverse (21000210001), we get a palindrome (1021120211201).

The spelling of 1000120001200 in words is "one trillion, one hundred twenty million, one thousand, two hundred".