2001231212011 has 8 divisors (see below), whose sum is σ = 2016277314800. Its totient is φ = 1986194377440.

The previous prime is 2001231212009. The next prime is 2001231212017. The reversal of 2001231212011 is 1102121321002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2001231212011 - 2¹ = 2001231212009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001231212017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1883280 + ... + 2747581.

It is an arithmetic number, because the mean of its divisors is an integer number (252034664350).

Almost surely, 2^{2001231212011} is an apocalyptic number.

2001231212011 is a deficient number, since it is larger than the sum of its proper divisors (15046102789).

2001231212011 is a wasteful number, since it uses less digits than its factorization.

2001231212011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4634109.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 2001231212011 its reverse (1102121321002), we get a palindrome (3103352533013).

The spelling of 2001231212011 in words is "two trillion, one billion, two hundred thirty-one million, two hundred twelve thousand, eleven".