2001022011005 has 4 divisors (see below), whose sum is σ = 2401226413212. Its totient is φ = 1600817608800.

The previous prime is 2001022010969. The next prime is 2001022011013. The reversal of 2001022011005 is 5001102201002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 680997951076 + 1320024059929 = 825226^2 + 1148923^2 .

It is not a de Polignac number, because 2001022011005 - 2¹⁰ = 2001022009981 is a prime.

It is a super-2 number, since 2×2001022011005² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200102201096 + ... + 200102201105.

It is an arithmetic number, because the mean of its divisors is an integer number (600306603303).

Almost surely, 2^{2001022011005} is an apocalyptic number.

It is an amenable number.

2001022011005 is a deficient number, since it is larger than the sum of its proper divisors (400204402207).

2001022011005 is an equidigital number, since it uses as much as digits as its factorization.

2001022011005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400204402206.

The product of its (nonzero) digits is 40, while the sum is 14.

Adding to 2001022011005 its reverse (5001102201002), we get a palindrome (7002124212007).

The spelling of 2001022011005 in words is "two trillion, one billion, twenty-two million, eleven thousand, five".