2001021101211 has 64 divisors (see below), whose sum is σ = 3038712348672. Its totient is φ = 1160276400000.

The previous prime is 2001021101207. The next prime is 2001021101213. The reversal of 2001021101211 is 1121011201002.

It is not a de Polignac number, because 2001021101211 - 2² = 2001021101207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2001021101213) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 71382180 + ... + 71410206.

It is an arithmetic number, because the mean of its divisors is an integer number (47479880448).

Almost surely, 2^{2001021101211} is an apocalyptic number.

2001021101211 is a deficient number, since it is larger than the sum of its proper divisors (1037691247461).

2001021101211 is a wasteful number, since it uses less digits than its factorization.

2001021101211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28864.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 2001021101211 its reverse (1121011201002), we get a palindrome (3122032302213).

The spelling of 2001021101211 in words is "two trillion, one billion, twenty-one million, one hundred one thousand, two hundred eleven".