1111123120223 has 2 divisors, whose sum is σ = 1111123120224. Its totient is φ = 1111123120222.

The previous prime is 1111123120193. The next prime is 1111123120267. The reversal of 1111123120223 is 3220213211111.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111123120223 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1111123120195 and 1111123120204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111123120423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555561560111 + 555561560112.

It is an arithmetic number, because the mean of its divisors is an integer number (555561560112).

Almost surely, 2^{1111123120223} is an apocalyptic number.

1111123120223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111123120223 is an equidigital number, since it uses as much as digits as its factorization.

1111123120223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1111123120223 its reverse (3220213211111), we get a palindrome (4331336331334).

The spelling of 1111123120223 in words is "one trillion, one hundred eleven billion, one hundred twenty-three million, one hundred twenty thousand, two hundred twenty-three".