2001201100 has 18 divisors (see below), whose sum is σ = 4342606604. Its totient is φ = 800480400.

The previous prime is 2001201067. The next prime is 2001201107. The reversal of 2001201100 is 11021002.

It is not an unprimeable number, because it can be changed into a prime (2001201107) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10005906 + ... + 10006105.

Almost surely, 2^2001201100 is an apocalyptic number.

2001201100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001201100 is an abundant number, since it is smaller than the sum of its proper divisors (2341405504).

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

2001201100 is a wasteful number, since it uses less digits than its factorization.

2001201100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20012025 (or 20012018 counting only the distinct ones).

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

The square root of 2001201100 is about 44734.7862406875. The cubic root of 2001201100 is about 1260.1732146179.

Adding to 2001201100 its reverse (11021002), we get a palindrome (2012222102).

The spelling of 2001201100 in words is "two billion, one million, two hundred one thousand, one hundred".