2001231011211 has 16 divisors (see below), whose sum is σ = 2698631316000. Its totient is φ = 1318996160768.

The previous prime is 2001231011207. The next prime is 2001231011231. The reversal of 2001231011211 is 1121101321002.

It is a cyclic number.

It is not a de Polignac number, because 2001231011211 - 2² = 2001231011207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2001231011231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1650925 + ... + 2593841.

It is an arithmetic number, because the mean of its divisors is an integer number (168664457250).

Almost surely, 2^{2001231011211} is an apocalyptic number.

2001231011211 is a deficient number, since it is larger than the sum of its proper divisors (697400304789).

2001231011211 is an equidigital number, since it uses as much as digits as its factorization.

2001231011211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950958.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 2001231011211 its reverse (1121101321002), we get a palindrome (3122332332213).

The spelling of 2001231011211 in words is "two trillion, one billion, two hundred thirty-one million, eleven thousand, two hundred eleven".