2001010122021 has 16 divisors (see below), whose sum is σ = 2702905422336. Its totient is φ = 1316593489776.

The previous prime is 2001010122019. The next prime is 2001010122037. The reversal of 2001010122021 is 1202210101002.

It is not a de Polignac number, because 2001010122021 - 2¹ = 2001010122019 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2001010121988 and 2001010122006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001010122011) 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, 3842815 + ... + 4332348.

It is an arithmetic number, because the mean of its divisors is an integer number (168931588896).

Almost surely, 2^{2001010122021} is an apocalyptic number.

It is an amenable number.

2001010122021 is a deficient number, since it is larger than the sum of its proper divisors (701895300315).

2001010122021 is an equidigital number, since it uses as much as digits as its factorization.

2001010122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8176232.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2001010122021 its reverse (1202210101002), we get a palindrome (3203220223023).

The spelling of 2001010122021 in words is "two trillion, one billion, ten million, one hundred twenty-two thousand, twenty-one".