201111213131 has 4 divisors (see below), whose sum is σ = 201112116192. Its totient is φ = 201110310072.

The previous prime is 201111213119. The next prime is 201111213133. The reversal of 201111213131 is 131312111102.

201111213131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 201111213131 - 2¹⁸ = 201110950987 is a prime.

It is a super-2 number, since 2×201111213131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201111213133) 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, 146846 + ... + 650988.

It is an arithmetic number, because the mean of its divisors is an integer number (50278029048).

Almost surely, 2^201111213131 is an apocalyptic number.

201111213131 is a deficient number, since it is larger than the sum of its proper divisors (903061).

201111213131 is an equidigital number, since it uses as much as digits as its factorization.

201111213131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903060.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 201111213131 its reverse (131312111102), we get a palindrome (332423324233).

The spelling of 201111213131 in words is "two hundred one billion, one hundred eleven million, two hundred thirteen thousand, one hundred thirty-one".