1111231229 has 2 divisors, whose sum is σ = 1111231230. Its totient is φ = 1111231228.

The previous prime is 1111231201. The next prime is 1111231267. The reversal of 1111231229 is 9221321111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 555686329 + 555544900 = 23573^2 + 23570^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111231229 - 2²⁴ = 1094454013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111231279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555615614 + 555615615.

It is an arithmetic number, because the mean of its divisors is an integer number (555615615).

Almost surely, 2^1111231229 is an apocalyptic number.

It is an amenable number.

1111231229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111231229 is an equidigital number, since it uses as much as digits as its factorization.

1111231229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 23.

The square root of 1111231229 is about 33335.1350529738. The cubic root of 1111231229 is about 1035.7814907273.

The spelling of 1111231229 in words is "one billion, one hundred eleven million, two hundred thirty-one thousand, two hundred twenty-nine".