2001231103133 has 4 divisors (see below), whose sum is σ = 2002413166908. Its totient is φ = 2000049039360.

The previous prime is 2001231103129. The next prime is 2001231103141. The reversal of 2001231103133 is 3313011321002.

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

It can be written as a sum of positive squares in 2 ways, for example, as 748662754009 + 1252568349124 = 865253^2 + 1119182^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001231103133 - 2² = 2001231103129 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001231103633) 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, 591029348 + ... + 591032733.

It is an arithmetic number, because the mean of its divisors is an integer number (500603291727).

Almost surely, 2^{2001231103133} is an apocalyptic number.

It is an amenable number.

2001231103133 is a deficient number, since it is larger than the sum of its proper divisors (1182063775).

2001231103133 is a wasteful number, since it uses less digits than its factorization.

2001231103133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182063774.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 2001231103133 its reverse (3313011321002), we get a palindrome (5314242424135).

The spelling of 2001231103133 in words is "two trillion, one billion, two hundred thirty-one million, one hundred three thousand, one hundred thirty-three".