231111211023 has 144 divisors (see below), whose sum is σ = 458103320064. Its totient is φ = 110589534720.

The previous prime is 231111210977. The next prime is 231111211027. The reversal of 231111211023 is 320112111132.

It is not a de Polignac number, because 231111211023 - 2¹⁰ = 231111209999 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231111210987 and 231111211005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231111211027) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 3846136 + ... + 3905762.

It is an arithmetic number, because the mean of its divisors is an integer number (3181273056).

Almost surely, 2^231111211023 is an apocalyptic number.

231111211023 is a deficient number, since it is larger than the sum of its proper divisors (226992109041).

231111211023 is a wasteful number, since it uses less digits than its factorization.

231111211023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59722 (or 59712 counting only the distinct ones).

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

Adding to 231111211023 its reverse (320112111132), we get a palindrome (551223322155).

The spelling of 231111211023 in words is "two hundred thirty-one billion, one hundred eleven million, two hundred eleven thousand, twenty-three".