231312201111 has 6 divisors (see below), whose sum is σ = 334117623840. Its totient is φ = 154208134068.

The previous prime is 231312201089. The next prime is 231312201119. The reversal of 231312201111 is 111102213132.

It is not a de Polignac number, because 231312201111 - 2⁶ = 231312201047 is a prime.

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 in 5 ways as a sum of consecutive naturals, for example, 12850677831 + ... + 12850677848.

It is an arithmetic number, because the mean of its divisors is an integer number (55686270640).

Almost surely, 2^231312201111 is an apocalyptic number.

231312201111 is a deficient number, since it is larger than the sum of its proper divisors (102805422729).

231312201111 is a wasteful number, since it uses less digits than its factorization.

231312201111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25701355685 (or 25701355682 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 231312201111 its reverse (111102213132), we get a palindrome (342414414243).

The spelling of 231312201111 in words is "two hundred thirty-one billion, three hundred twelve million, two hundred one thousand, one hundred eleven".