231111110223 has 20 divisors (see below), whose sum is σ = 394560062160. Its totient is φ = 132063491232.

The previous prime is 231111110221. The next prime is 231111110231. The reversal of 231111110223 is 322011111132.

It is not a de Polignac number, because 231111110223 - 2¹ = 231111110221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231111110196 and 231111110205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231111110221) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 203801118 + ... + 203802251.

It is an arithmetic number, because the mean of its divisors is an integer number (19728003108).

Almost surely, 2^231111110223 is an apocalyptic number.

231111110223 is a deficient number, since it is larger than the sum of its proper divisors (163448951937).

231111110223 is an equidigital number, since it uses as much as digits as its factorization.

231111110223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407603388 (or 407603379 counting only the distinct ones).

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

Adding to 231111110223 its reverse (322011111132), we get a palindrome (553122221355).

Subtracting 231111110223 from its reverse (322011111132), we obtain a palindrome (90900000909).

The spelling of 231111110223 in words is "two hundred thirty-one billion, one hundred eleven million, one hundred ten thousand, two hundred twenty-three".