231012111 has 24 divisors (see below), whose sum is σ = 341297152. Its totient is φ = 138877200.

The previous prime is 231012109. The next prime is 231012113. The reversal of 231012111 is 111210132.

It is an interprime number because it is at equal distance from previous prime (231012109) and next prime (231012113).

It is not a de Polignac number, because 231012111 - 2¹ = 231012109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231012113) 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 23 ways as a sum of consecutive naturals, for example, 43596 + ... + 48606.

Almost surely, 2^231012111 is an apocalyptic number.

231012111 is a deficient number, since it is larger than the sum of its proper divisors (110285041).

231012111 is a wasteful number, since it uses less digits than its factorization.

231012111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5163 (or 5152 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 231012111 is about 15199.0825709975. The cubic root of 231012111 is about 613.5899668065.

Adding to 231012111 its reverse (111210132), we get a palindrome (342222243).

It can be divided in two parts, 2310121 and 11, that added together give a palindrome (2310132).

The spelling of 231012111 in words is "two hundred thirty-one million, twelve thousand, one hundred eleven".