201131311 has 4 divisors (see below), whose sum is σ = 201160792. Its totient is φ = 201101832.

The previous prime is 201131309. The next prime is 201131341. The reversal of 201131311 is 113131102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 201131311 - 2¹ = 201131309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201131291 and 201131300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201131341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1345 + ... + 20101.

It is an arithmetic number, because the mean of its divisors is an integer number (50290198).

Almost surely, 2^201131311 is an apocalyptic number.

201131311 is a deficient number, since it is larger than the sum of its proper divisors (29481).

201131311 is a wasteful number, since it uses less digits than its factorization.

201131311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29480.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 201131311 is about 14182.0771045711. The cubic root of 201131311 is about 585.9041328806.

Adding to 201131311 its reverse (113131102), we get a palindrome (314262413).

The spelling of 201131311 in words is "two hundred one million, one hundred thirty-one thousand, three hundred eleven".