2001200985 has 96 divisors (see below), whose sum is σ = 4353253632. Its totient is φ = 860958720.

The previous prime is 2001200983. The next prime is 2001200989. The reversal of 2001200985 is 5890021002.

It is not a de Polignac number, because 2001200985 - 2¹ = 2001200983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2001200983) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 137665 + ... + 151505.

It is an arithmetic number, because the mean of its divisors is an integer number (45346392).

Almost surely, 2^2001200985 is an apocalyptic number.

It is an amenable number.

2001200985 is an abundant number, since it is smaller than the sum of its proper divisors (2352052647).

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

2001200985 is a wasteful number, since it uses less digits than its factorization.

2001200985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13885 (or 13873 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 2001200985 is about 44734.7849553343. The cubic root of 2001200985 is about 1260.1731904791.

Adding to 2001200985 its reverse (5890021002), we get a palindrome (7891221987).

The spelling of 2001200985 in words is "two billion, one million, two hundred thousand, nine hundred eighty-five".