2131230111 has 4 divisors (see below), whose sum is σ = 2841640152. Its totient is φ = 1420820072.

The previous prime is 2131230107. The next prime is 2131230121. The reversal of 2131230111 is 1110321312.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2131230111 - 2² = 2131230107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131230121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355205016 + ... + 355205021.

It is an arithmetic number, because the mean of its divisors is an integer number (710410038).

Almost surely, 2^2131230111 is an apocalyptic number.

2131230111 is a deficient number, since it is larger than the sum of its proper divisors (710410041).

2131230111 is an equidigital number, since it uses as much as digits as its factorization.

2131230111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710410040.

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

The square root of 2131230111 is about 46165.2478710989. The cubic root of 2131230111 is about 1286.8959906142.

Adding to 2131230111 its reverse (1110321312), we get a palindrome (3241551423).

The spelling of 2131230111 in words is "two billion, one hundred thirty-one million, two hundred thirty thousand, one hundred eleven".