111111111111229 has 2 divisors, whose sum is σ = 111111111111230. Its totient is φ = 111111111111228.

The previous prime is 111111111111053. The next prime is 111111111111233. The reversal of 111111111111229 is 922111111111111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81822698448100 + 29288412663129 = 9045590^2 + 5411877^2 .

It is a cyclic number.

It is not a de Polignac number, because 111111111111229 - 2²¹ = 111111109014077 is a prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111111111111529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555555555614 + 55555555555615.

It is an arithmetic number, because the mean of its divisors is an integer number (55555555555615).

Almost surely, 2^{111111111111229} is an apocalyptic number.

It is an amenable number.

111111111111229 is a deficient number, since it is larger than the sum of its proper divisors (1).

111111111111229 is an equidigital number, since it uses as much as digits as its factorization.

111111111111229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36, while the sum is 25.

The spelling of 111111111111229 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred eleven million, one hundred eleven thousand, two hundred twenty-nine".