111111222223 has 2 divisors, whose sum is σ = 111111222224. Its totient is φ = 111111222222.

The previous prime is 111111222191. The next prime is 111111222247. The reversal of 111111222223 is 322222111111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111111222223 - 2⁵ = 111111222191 is a prime.

It is the 333334-th Hogben number.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 111111222223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111111222263) by changing a digit.

It is a nontrivial repunit in base 333333.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555611111 + 55555611112.

It is an arithmetic number, because the mean of its divisors is an integer number (55555611112).

Almost surely, 2^111111222223 is an apocalyptic number.

111111222223 is a deficient number, since it is larger than the sum of its proper divisors (1).

111111222223 is an equidigital number, since it uses as much as digits as its factorization.

111111222223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96, while the sum is 19.

Adding to 111111222223 its reverse (322222111111), we get a palindrome (433333333334).

The spelling of 111111222223 in words is "one hundred eleven billion, one hundred eleven million, two hundred twenty-two thousand, two hundred twenty-three".