2001231313133 has 16 divisors (see below), whose sum is σ = 2194030976256. Its totient is φ = 1814185390080.

The previous prime is 2001231313129. The next prime is 2001231313157. The reversal of 2001231313133 is 3313131321002.

It is a cyclic number.

It is not a de Polignac number, because 2001231313133 - 2² = 2001231313129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2001231313099 and 2001231313108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001231315133) 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, 3981041 + ... + 4455462.

It is an arithmetic number, because the mean of its divisors is an integer number (137126936016).

Almost surely, 2^{2001231313133} is an apocalyptic number.

It is an amenable number.

2001231313133 is a deficient number, since it is larger than the sum of its proper divisors (192799663123).

2001231313133 is a wasteful number, since it uses less digits than its factorization.

2001231313133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8436844.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 2001231313133 its reverse (3313131321002), we get a palindrome (5314362634135).

The spelling of 2001231313133 in words is "two trillion, one billion, two hundred thirty-one million, three hundred thirteen thousand, one hundred thirty-three".