201232131111 has 32 divisors (see below), whose sum is σ = 344354457600. Its totient is φ = 114784813440.

The previous prime is 201232131091. The next prime is 201232131157. The reversal of 201232131111 is 111131232102.

201232131111 is a `hidden beast` number, since 20 + 1 + 2 + 321 + 311 + 11 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-201232131111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201232131011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19922871 + ... + 19932968.

It is an arithmetic number, because the mean of its divisors is an integer number (10761076800).

Almost surely, 2^201232131111 is an apocalyptic number.

201232131111 is a deficient number, since it is larger than the sum of its proper divisors (143122326489).

201232131111 is a wasteful number, since it uses less digits than its factorization.

201232131111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39855876 (or 39855870 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 201232131111 its reverse (111131232102), we get a palindrome (312363363213).

It can be divided in two parts, 2012 and 32131111, that added together give a palindrome (32133123).

The spelling of 201232131111 in words is "two hundred one billion, two hundred thirty-two million, one hundred thirty-one thousand, one hundred eleven".