111331123 has 2 divisors, whose sum is σ = 111331124. Its totient is φ = 111331122.

The previous prime is 111331117. The next prime is 111331151. The reversal of 111331123 is 321133111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111331123 - 2⁵ = 111331091 is a prime.

It is a super-2 number, since 2×111331123² = 24789237896882258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111331097 and 111331106.

It is not a weakly prime, because it can be changed into another prime (111331163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55665561 + 55665562.

It is an arithmetic number, because the mean of its divisors is an integer number (55665562).

Almost surely, 2^111331123 is an apocalyptic number.

111331123 is a deficient number, since it is larger than the sum of its proper divisors (1).

111331123 is an equidigital number, since it uses as much as digits as its factorization.

111331123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54, while the sum is 16.

The square root of 111331123 is about 10551.3564530822. The cubic root of 111331123 is about 481.0669596142.

Adding to 111331123 its reverse (321133111), we get a palindrome (432464234).

The spelling of 111331123 in words is "one hundred eleven million, three hundred thirty-one thousand, one hundred twenty-three".