231011011111 has 8 divisors (see below), whose sum is σ = 244213135920. Its totient is φ = 217913251392.

The previous prime is 231011011109. The next prime is 231011011139. The reversal of 231011011111 is 111110110132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231011011111 - 2¹ = 231011011109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231011011091 and 231011011100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231011011211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26086720 + ... + 26095573.

It is an arithmetic number, because the mean of its divisors is an integer number (30526641990).

Almost surely, 2^231011011111 is an apocalyptic number.

231011011111 is a deficient number, since it is larger than the sum of its proper divisors (13202124809).

231011011111 is a wasteful number, since it uses less digits than its factorization.

231011011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52182545.

The product of its (nonzero) digits is 6, while the sum is 13.

Adding to 231011011111 its reverse (111110110132), we get a palindrome (342121121243).

The spelling of 231011011111 in words is "two hundred thirty-one billion, eleven million, eleven thousand, one hundred eleven".