2001211140221 has 4 divisors (see below), whose sum is σ = 2001306625152. Its totient is φ = 2001115655292.

The previous prime is 2001211140211. The next prime is 2001211140233. The reversal of 2001211140221 is 1220411121002.

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 not a de Polignac number, because 2001211140221 - 2²⁶ = 2001144031357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2001211140221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001211140211) 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, 47711021 + ... + 47752946.

It is an arithmetic number, because the mean of its divisors is an integer number (500326656288).

Almost surely, 2^{2001211140221} is an apocalyptic number.

It is an amenable number.

2001211140221 is a deficient number, since it is larger than the sum of its proper divisors (95484931).

2001211140221 is an equidigital number, since it uses as much as digits as its factorization.

2001211140221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95484930.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2001211140221 its reverse (1220411121002), we get a palindrome (3221622261223).

The spelling of 2001211140221 in words is "two trillion, one billion, two hundred eleven million, one hundred forty thousand, two hundred twenty-one".