201111131 has 12 divisors (see below), whose sum is σ = 219664368. Its totient is φ = 183034944.

The previous prime is 201111107. The next prime is 201111161. The reversal of 201111131 is 131111102.

It is a happy number.

It is not a de Polignac number, because 201111131 - 2²² = 196916827 is a prime.

It is a super-2 number, since 2×201111131² = 80891374024198322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201111161) 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 11 ways as a sum of consecutive naturals, for example, 67826 + ... + 70728.

It is an arithmetic number, because the mean of its divisors is an integer number (18305364).

Almost surely, 2^201111131 is an apocalyptic number.

201111131 is a deficient number, since it is larger than the sum of its proper divisors (18553237).

201111131 is an equidigital number, since it uses as much as digits as its factorization.

201111131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3062 (or 2989 counting only the distinct ones).

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

The square root of 201111131 is about 14181.3656253550. The cubic root of 201111131 is about 585.8845371568.

Adding to 201111131 its reverse (131111102), we get a palindrome (332222233).

The spelling of 201111131 in words is "two hundred one million, one hundred eleven thousand, one hundred thirty-one".