111242123 has 2 divisors, whose sum is σ = 111242124. Its totient is φ = 111242122.

The previous prime is 111242119. The next prime is 111242137. The reversal of 111242123 is 321242111.

It is a weak prime.

It is an emirp because it is prime and its reverse (321242111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111242123 - 2² = 111242119 is a prime.

It is not a weakly prime, because it can be changed into another prime (111242323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55621061 + 55621062.

It is an arithmetic number, because the mean of its divisors is an integer number (55621062).

Almost surely, 2^111242123 is an apocalyptic number.

111242123 is a deficient number, since it is larger than the sum of its proper divisors (1).

111242123 is an equidigital number, since it uses as much as digits as its factorization.

111242123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96, while the sum is 17.

The square root of 111242123 is about 10547.1381426432. The cubic root of 111242123 is about 480.9387343934.

Adding to 111242123 its reverse (321242111), we get a palindrome (432484234).

The spelling of 111242123 in words is "one hundred eleven million, two hundred forty-two thousand, one hundred twenty-three".