111221039 has 2 divisors, whose sum is σ = 111221040. Its totient is φ = 111221038.

The previous prime is 111221023. The next prime is 111221051. The reversal of 111221039 is 930122111.

It is a strong prime.

It is an emirp because it is prime and its reverse (930122111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111221039 - 2⁴ = 111221023 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111221039.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111221339) 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, 55610519 + 55610520.

It is an arithmetic number, because the mean of its divisors is an integer number (55610520).

Almost surely, 2^111221039 is an apocalyptic number.

111221039 is a deficient number, since it is larger than the sum of its proper divisors (1).

111221039 is an equidigital number, since it uses as much as digits as its factorization.

111221039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 111221039 is about 10546.1385824386. The cubic root of 111221039 is about 480.9083479633.

The spelling of 111221039 in words is "one hundred eleven million, two hundred twenty-one thousand, thirty-nine".