111221153 has 2 divisors, whose sum is σ = 111221154. Its totient is φ = 111221152.

The previous prime is 111221141. The next prime is 111221167. The reversal of 111221153 is 351122111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58629649 + 52591504 = 7657^2 + 7252^2 .

It is a cyclic number.

It is not a de Polignac number, because 111221153 - 2¹⁶ = 111155617 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (111221653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55610576 + 55610577.

It is an arithmetic number, because the mean of its divisors is an integer number (55610577).

Almost surely, 2^111221153 is an apocalyptic number.

It is an amenable number.

111221153 is a deficient number, since it is larger than the sum of its proper divisors (1).

111221153 is an equidigital number, since it uses as much as digits as its factorization.

111221153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60, while the sum is 17.

The square root of 111221153 is about 10546.1439872590. The cubic root of 111221153 is about 480.9085122714.

Adding to 111221153 its reverse (351122111), we get a palindrome (462343264).

The spelling of 111221153 in words is "one hundred eleven million, two hundred twenty-one thousand, one hundred fifty-three".