2001120211001 has 4 divisors (see below), whose sum is σ = 2065672475904. Its totient is φ = 1936567946100.

The previous prime is 2001120210983. The next prime is 2001120211031. The reversal of 2001120211001 is 1001120211002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001120211001 is a prime.

It is a super-2 number, since 2×2001120211001² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001120211031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32276132405 + ... + 32276132466.

It is an arithmetic number, because the mean of its divisors is an integer number (516418118976).

Almost surely, 2^{2001120211001} is an apocalyptic number.

It is an amenable number.

2001120211001 is a deficient number, since it is larger than the sum of its proper divisors (64552264903).

2001120211001 is an equidigital number, since it uses as much as digits as its factorization.

2001120211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64552264902.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 2001120211001 its reverse (1001120211002), we get a palindrome (3002240422003).

Subtracting from 2001120211001 its reverse (1001120211002), we obtain a palindrome (999999999999).

The spelling of 2001120211001 in words is "two trillion, one billion, one hundred twenty million, two hundred eleven thousand, one".