1112300821 has 4 divisors (see below), whose sum is σ = 1112368000. Its totient is φ = 1112233644.

The previous prime is 1112300807. The next prime is 1112300873. The reversal of 1112300821 is 1280032111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1280032111 = 127 ⋅10078993.

It is a cyclic number.

It is not a de Polignac number, because 1112300821 - 2⁵ = 1112300789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1112310821) 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 in 3 ways as a sum of consecutive naturals, for example, 10810 + ... + 48388.

It is an arithmetic number, because the mean of its divisors is an integer number (278092000).

Almost surely, 2^1112300821 is an apocalyptic number.

It is an amenable number.

1112300821 is a deficient number, since it is larger than the sum of its proper divisors (67179).

1112300821 is an equidigital number, since it uses as much as digits as its factorization.

1112300821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67178.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 1112300821 is about 33351.1742072150. The cubic root of 1112300821 is about 1036.1137073135.

Adding to 1112300821 its reverse (1280032111), we get a palindrome (2392332932).

The spelling of 1112300821 in words is "one billion, one hundred twelve million, three hundred thousand, eight hundred twenty-one".