2001001100 has 36 divisors (see below), whose sum is σ = 4962484464. Its totient is φ = 686057280.

The previous prime is 2001001097. The next prime is 2001001103. The reversal of 2001001100 is 11001002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2001001097) and next prime (2001001103).

It is a Harshad number since it is a multiple of its sum of digits (5).

It is not an unprimeable number, because it can be changed into a prime (2001001103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1428587 + ... + 1429986.

Almost surely, 2^2001001100 is an apocalyptic number.

2001001100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001001100 is an abundant number, since it is smaller than the sum of its proper divisors (2961483364).

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

2001001100 is a wasteful number, since it uses less digits than its factorization.

2001001100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2858594 (or 2858587 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 5.

The square root of 2001001100 is about 44732.5507879888. The cubic root of 2001001100 is about 1260.1312326570.

Adding to 2001001100 its reverse (11001002), we get a palindrome (2012002102).

The spelling of 2001001100 in words is "two billion, one million, one thousand, one hundred".