201311133 has 4 divisors (see below), whose sum is σ = 268414848. Its totient is φ = 134207420.

The previous prime is 201311113. The next prime is 201311141. The reversal of 201311133 is 331113102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 201311133 - 2⁵ = 201311101 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201311113) 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, 33551853 + ... + 33551858.

It is an arithmetic number, because the mean of its divisors is an integer number (67103712).

Almost surely, 2^201311133 is an apocalyptic number.

It is an amenable number.

201311133 is a deficient number, since it is larger than the sum of its proper divisors (67103715).

201311133 is an equidigital number, since it uses as much as digits as its factorization.

201311133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67103714.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 201311133 is about 14188.4154506414. The cubic root of 201311133 is about 586.0786906017.

Adding to 201311133 its reverse (331113102), we get a palindrome (532424235).

The spelling of 201311133 in words is "two hundred one million, three hundred eleven thousand, one hundred thirty-three".