201111113333231 has 4 divisors (see below), whose sum is σ = 201111158553264. Its totient is φ = 201111068113200.

The previous prime is 201111113333173. The next prime is 201111113333257. The reversal of 201111113333231 is 132333311111102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201111113333231 is a prime.

It is a super-2 number, since 2×201111113333231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201111113333231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201111113303231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15109550 + ... + 25110171.

It is an arithmetic number, because the mean of its divisors is an integer number (50277789638316).

Almost surely, 2^{201111113333231} is an apocalyptic number.

201111113333231 is a deficient number, since it is larger than the sum of its proper divisors (45220033).

201111113333231 is an equidigital number, since it uses as much as digits as its factorization.

201111113333231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45220032.

The product of its (nonzero) digits is 972, while the sum is 26.

Adding to 201111113333231 its reverse (132333311111102), we get a palindrome (333444424444333).

The spelling of 201111113333231 in words is "two hundred one trillion, one hundred eleven billion, one hundred thirteen million, three hundred thirty-three thousand, two hundred thirty-one".