231031130111 has 2 divisors, whose sum is σ = 231031130112. Its totient is φ = 231031130110.

The previous prime is 231031130107. The next prime is 231031130123. The reversal of 231031130111 is 111031130132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231031130111 - 2² = 231031130107 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231031130111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231031130611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115515565055 + 115515565056.

It is an arithmetic number, because the mean of its divisors is an integer number (115515565056).

Almost surely, 2^231031130111 is an apocalyptic number.

231031130111 is a deficient number, since it is larger than the sum of its proper divisors (1).

231031130111 is an equidigital number, since it uses as much as digits as its factorization.

231031130111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 231031130111 its reverse (111031130132), we get a palindrome (342062260243).

The spelling of 231031130111 in words is "two hundred thirty-one billion, thirty-one million, one hundred thirty thousand, one hundred eleven".