2001121000200 has 384 divisors, whose sum is σ = 7947157420800. Its totient is φ = 453350338560.

The previous prime is 2001121000189. The next prime is 2001121000247. The reversal of 2001121000200 is 20001211002.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4037154 + ... + 4505646.

It is an arithmetic number, because the mean of its divisors is an integer number (20695722450).

Almost surely, 2^{2001121000200} is an apocalyptic number.

2001121000200 is a gapful number since it is divisible by the number (20) 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 2001121000200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3973578710400).

2001121000200 is an abundant number, since it is smaller than the sum of its proper divisors (5946036420600).

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

2001121000200 is a wasteful number, since it uses less digits than its factorization.

2001121000200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468638 (or 468623 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 2001121000200 its reverse (20001211002), we get a palindrome (2021122211202).

The spelling of 2001121000200 in words is "two trillion, one billion, one hundred twenty-one million, two hundred", and thus it is an aban number.