231312201112 has 8 divisors (see below), whose sum is σ = 433710377100. Its totient is φ = 115656100552.

The previous prime is 231312201089. The next prime is 231312201119. The reversal of 231312201112 is 211102213132.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 231312201112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231312201119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14457012562 + ... + 14457012577.

Almost surely, 2^231312201112 is an apocalyptic number.

It is an amenable number.

231312201112 is a deficient number, since it is larger than the sum of its proper divisors (202398175988).

231312201112 is a wasteful number, since it uses less digits than its factorization.

231312201112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28914025145 (or 28914025141 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 231312201112 its reverse (211102213132), we get a palindrome (442414414244).

The spelling of 231312201112 in words is "two hundred thirty-one billion, three hundred twelve million, two hundred one thousand, one hundred twelve".