1113200021 has 2 divisors, whose sum is σ = 1113200022. Its totient is φ = 1113200020.

The previous prime is 1113200017. The next prime is 1113200057. The reversal of 1113200021 is 1200023111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 974313796 + 138886225 = 31214^2 + 11785^2 .

It is a cyclic number.

It is not a de Polignac number, because 1113200021 - 2² = 1113200017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1113199975 and 1113200011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1113200321) 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, 556600010 + 556600011.

It is an arithmetic number, because the mean of its divisors is an integer number (556600011).

Almost surely, 2^1113200021 is an apocalyptic number.

It is an amenable number.

1113200021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1113200021 is an equidigital number, since it uses as much as digits as its factorization.

1113200021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1113200021 is about 33364.6522685311. The cubic root of 1113200021 is about 1036.3928351900.

Adding to 1113200021 its reverse (1200023111), we get a palindrome (2313223132).

The spelling of 1113200021 in words is "one billion, one hundred thirteen million, two hundred thousand, twenty-one".