231321111223 has 2 divisors, whose sum is σ = 231321111224. Its totient is φ = 231321111222.

The previous prime is 231321111187. The next prime is 231321111293. The reversal of 231321111223 is 322111123132.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231321111223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231321111194 and 231321111203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231321111293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115660555611 + 115660555612.

It is an arithmetic number, because the mean of its divisors is an integer number (115660555612).

Almost surely, 2^231321111223 is an apocalyptic number.

231321111223 is a deficient number, since it is larger than the sum of its proper divisors (1).

231321111223 is an equidigital number, since it uses as much as digits as its factorization.

231321111223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 22.

Adding to 231321111223 its reverse (322111123132), we get a palindrome (553432234355).

The spelling of 231321111223 in words is "two hundred thirty-one billion, three hundred twenty-one million, one hundred eleven thousand, two hundred twenty-three".