201111311 has 4 divisors (see below), whose sum is σ = 203063952. Its totient is φ = 199158672.

The previous prime is 201111299. The next prime is 201111329. The reversal of 201111311 is 113111102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 201111311 - 2⁶ = 201111247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201111292 and 201111301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201111341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 976166 + ... + 976371.

It is an arithmetic number, because the mean of its divisors is an integer number (50765988).

Almost surely, 2^201111311 is an apocalyptic number.

201111311 is a deficient number, since it is larger than the sum of its proper divisors (1952641).

201111311 is a wasteful number, since it uses less digits than its factorization.

201111311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1952640.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 201111311 is about 14181.3719717099. The cubic root of 201111311 is about 585.8847119510.

Adding to 201111311 its reverse (113111102), we get a palindrome (314222413).

The spelling of 201111311 in words is "two hundred one million, one hundred eleven thousand, three hundred eleven".