111231011 has 2 divisors, whose sum is σ = 111231012. Its totient is φ = 111231010.

The previous prime is 111230993. The next prime is 111231019. The reversal of 111231011 is 110132111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111231011 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 111230983 and 111231001.

It is not a weakly prime, because it can be changed into another prime (111231019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55615505 + 55615506.

It is an arithmetic number, because the mean of its divisors is an integer number (55615506).

Almost surely, 2^111231011 is an apocalyptic number.

111231011 is a deficient number, since it is larger than the sum of its proper divisors (1).

111231011 is an equidigital number, since it uses as much as digits as its factorization.

111231011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 111231011 is about 10546.6113515195. The cubic root of 111231011 is about 480.9227201684.

Adding to 111231011 its reverse (110132111), we get a palindrome (221363122).

It can be divided in two parts, 1112 and 31011, that added together give a palindrome (32123).

The spelling of 111231011 in words is "one hundred eleven million, two hundred thirty-one thousand, eleven".