231200031111 has 16 divisors (see below), whose sum is σ = 357563092224. Its totient is φ = 130142447424.

The previous prime is 231200031103. The next prime is 231200031113. The reversal of 231200031111 is 111130002132.

It is a happy number.

It is not a de Polignac number, because 231200031111 - 2³ = 231200031103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231200031113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82159230 + ... + 82162043.

It is an arithmetic number, because the mean of its divisors is an integer number (22347693264).

Almost surely, 2^231200031111 is an apocalyptic number.

231200031111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

231200031111 is a deficient number, since it is larger than the sum of its proper divisors (126363061113).

231200031111 is a wasteful number, since it uses less digits than its factorization.

231200031111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164321350.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 231200031111 its reverse (111130002132), we get a palindrome (342330033243).

The spelling of 231200031111 in words is "two hundred thirty-one billion, two hundred million, thirty-one thousand, one hundred eleven".