111223031 has 2 divisors, whose sum is σ = 111223032. Its totient is φ = 111223030.

The previous prime is 111223001. The next prime is 111223109. The reversal of 111223031 is 130322111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111223031 - 2⁶ = 111222967 is a prime.

It is a super-2 number, since 2×111223031² = 24741125249653922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111222997 and 111223015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111223001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55611515 + 55611516.

It is an arithmetic number, because the mean of its divisors is an integer number (55611516).

Almost surely, 2^111223031 is an apocalyptic number.

111223031 is a deficient number, since it is larger than the sum of its proper divisors (1).

111223031 is an equidigital number, since it uses as much as digits as its factorization.

111223031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 111223031 is about 10546.2330241655. The cubic root of 111223031 is about 480.9112190140.

Adding to 111223031 its reverse (130322111), we get a palindrome (241545142).

The spelling of 111223031 in words is "one hundred eleven million, two hundred twenty-three thousand, thirty-one".