2001220000101 has 16 divisors (see below), whose sum is σ = 3388308995200. Its totient is φ = 1143554285664.

The previous prime is 2001220000051. The next prime is 2001220000123. The reversal of 2001220000101 is 1010000221002.

It is not a de Polignac number, because 2001220000101 - 2⁹ = 2001219999589 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001220000501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5294232616 + ... + 5294232993.

It is an arithmetic number, because the mean of its divisors is an integer number (211769312200).

Almost surely, 2^{2001220000101} is an apocalyptic number.

2001220000101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2001220000101 is a deficient number, since it is larger than the sum of its proper divisors (1387088995099).

2001220000101 is a wasteful number, since it uses less digits than its factorization.

2001220000101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10588465625 (or 10588465619 counting only the distinct ones).

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

Adding to 2001220000101 its reverse (1010000221002), we get a palindrome (3011220221103).

The spelling of 2001220000101 in words is "two trillion, one billion, two hundred twenty million, one hundred one", and thus it is an aban number.