2001012101211 has 4 divisors (see below), whose sum is σ = 2668016134952. Its totient is φ = 1334008067472.

The previous prime is 2001012101183. The next prime is 2001012101251. The reversal of 2001012101211 is 1121012101002.

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

It is not a de Polignac number, because 2001012101211 - 2¹⁸ = 2001011839067 is a prime.

It is a super-2 number, since 2×2001012101211² (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 (2001012101251) 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, 333502016866 + ... + 333502016871.

It is an arithmetic number, because the mean of its divisors is an integer number (667004033738).

Almost surely, 2^{2001012101211} is an apocalyptic number.

2001012101211 is a deficient number, since it is larger than the sum of its proper divisors (667004033741).

2001012101211 is an equidigital number, since it uses as much as digits as its factorization.

2001012101211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667004033740.

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

Adding to 2001012101211 its reverse (1121012101002), we get a palindrome (3122024202213).

The spelling of 2001012101211 in words is "two trillion, one billion, twelve million, one hundred one thousand, two hundred eleven".