111300821 has 2 divisors, whose sum is σ = 111300822. Its totient is φ = 111300820.

The previous prime is 111300799. The next prime is 111300851. The reversal of 111300821 is 128003111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105801796 + 5499025 = 10286^2 + 2345^2 .

It is an emirp because it is prime and its reverse (128003111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111300821 - 2¹⁸ = 111038677 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111300821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111300851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55650410 + 55650411.

It is an arithmetic number, because the mean of its divisors is an integer number (55650411).

Almost surely, 2^111300821 is an apocalyptic number.

It is an amenable number.

111300821 is a deficient number, since it is larger than the sum of its proper divisors (1).

111300821 is an equidigital number, since it uses as much as digits as its factorization.

111300821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 17.

The square root of 111300821 is about 10549.9204262402. The cubic root of 111300821 is about 481.0233102034.

Adding to 111300821 its reverse (128003111), we get a palindrome (239303932).

The spelling of 111300821 in words is "one hundred eleven million, three hundred thousand, eight hundred twenty-one".