1112021231 has 2 divisors, whose sum is σ = 1112021232. Its totient is φ = 1112021230.

The previous prime is 1112021213. The next prime is 1112021297. The reversal of 1112021231 is 1321202111.

Together with previous prime (1112021213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1112021231 - 2¹⁸ = 1111759087 is a prime.

It is a super-2 number, since 2×1112021231² = 2473182436389510722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1112021831) 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, 556010615 + 556010616.

It is an arithmetic number, because the mean of its divisors is an integer number (556010616).

Almost surely, 2^1112021231 is an apocalyptic number.

1112021231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1112021231 is an equidigital number, since it uses as much as digits as its factorization.

1112021231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1112021231 is about 33346.9823372371. The cubic root of 1112021231 is about 1036.0268868834.

Adding to 1112021231 its reverse (1321202111), we get a palindrome (2433223342).

The spelling of 1112021231 in words is "one billion, one hundred twelve million, twenty-one thousand, two hundred thirty-one".