2001220101100 has 54 divisors (see below), whose sum is σ = 4773323445212. Its totient is φ = 727716396000.

The previous prime is 2001220101073. The next prime is 2001220101103. The reversal of 2001220101100 is 11010221002.

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

It is not an unprimeable number, because it can be changed into a prime (2001220101103) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 82682946 + ... + 82707145.

Almost surely, 2^{2001220101100} is an apocalyptic number.

2001220101100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001220101100 is an abundant number, since it is smaller than the sum of its proper divisors (2772103344112).

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

2001220101100 is a wasteful number, since it uses less digits than its factorization.

2001220101100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165390127 (or 165390109 counting only the distinct ones).

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

Adding to 2001220101100 its reverse (11010221002), we get a palindrome (2012230322102).

The spelling of 2001220101100 in words is "two trillion, one billion, two hundred twenty million, one hundred one thousand, one hundred".