2001131266135 has 8 divisors (see below), whose sum is σ = 2401374275856. Its totient is φ = 1600893841920.

The previous prime is 2001131266111. The next prime is 2001131266139. The reversal of 2001131266135 is 5316621311002.

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

It is not a de Polignac number, because 2001131266135 - 2¹¹ = 2001131264087 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001131266097 and 2001131266106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001131266139) 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, 562954 + ... + 2078263.

It is an arithmetic number, because the mean of its divisors is an integer number (300171784482).

Almost surely, 2^{2001131266135} is an apocalyptic number.

2001131266135 is a deficient number, since it is larger than the sum of its proper divisors (400243009721).

2001131266135 is a wasteful number, since it uses less digits than its factorization.

2001131266135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2792753.

The product of its (nonzero) digits is 6480, while the sum is 31.

Adding to 2001131266135 its reverse (5316621311002), we get a palindrome (7317752577137).

The spelling of 2001131266135 in words is "two trillion, one billion, one hundred thirty-one million, two hundred sixty-six thousand, one hundred thirty-five".