231301231111 has 4 divisors (see below), whose sum is σ = 231317441824. Its totient is φ = 231285020400.

The previous prime is 231301231103. The next prime is 231301231129. The reversal of 231301231111 is 111132103132.

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 231301231111 - 2³ = 231301231103 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 (231301231181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8083935 + ... + 8112496.

It is an arithmetic number, because the mean of its divisors is an integer number (57829360456).

Almost surely, 2^231301231111 is an apocalyptic number.

231301231111 is a deficient number, since it is larger than the sum of its proper divisors (16210713).

231301231111 is a wasteful number, since it uses less digits than its factorization.

231301231111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16210712.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 231301231111 its reverse (111132103132), we get a palindrome (342433334243).

The spelling of 231301231111 in words is "two hundred thirty-one billion, three hundred one million, two hundred thirty-one thousand, one hundred eleven".