2001201101200 has 180 divisors, whose sum is σ = 5594249899332. Its totient is φ = 685953945600.

The previous prime is 2001201101173. The next prime is 2001201101233. The reversal of 2001201101200 is 21011021002.

It can be written as a sum of positive squares in 6 ways, for example, as 324321138064 + 1676879963136 = 569492^2 + 1294944^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 96754860 + ... + 96775540.

Almost surely, 2^{2001201101200} is an apocalyptic number.

2001201101200 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 2001201101200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2797124949666).

2001201101200 is an abundant number, since it is smaller than the sum of its proper divisors (3593048798132).

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

2001201101200 is a wasteful number, since it uses less digits than its factorization.

2001201101200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25650 (or 25632 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 2001201101200 its reverse (21011021002), we get a palindrome (2022212122202).

The spelling of 2001201101200 in words is "two trillion, one billion, two hundred one million, one hundred one thousand, two hundred".