111121229 has 2 divisors, whose sum is σ = 111121230. Its totient is φ = 111121228.

The previous prime is 111121201. The next prime is 111121237. The reversal of 111121229 is 922121111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81036004 + 30085225 = 9002^2 + 5485^2 .

It is a cyclic number.

It is not a de Polignac number, because 111121229 - 2⁸ = 111120973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111121229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111121289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55560614 + 55560615.

It is an arithmetic number, because the mean of its divisors is an integer number (55560615).

Almost surely, 2^111121229 is an apocalyptic number.

It is an amenable number.

111121229 is a deficient number, since it is larger than the sum of its proper divisors (1).

111121229 is an equidigital number, since it uses as much as digits as its factorization.

111121229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72, while the sum is 20.

The square root of 111121229 is about 10541.4054565793. The cubic root of 111121229 is about 480.7644488471.

The spelling of 111121229 in words is "one hundred eleven million, one hundred twenty-one thousand, two hundred twenty-nine".