1113130021 has 2 divisors, whose sum is σ = 1113130022. Its totient is φ = 1113130020.

The previous prime is 1113130019. The next prime is 1113130037. The reversal of 1113130021 is 1200313111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1111889025 + 1240996 = 33345^2 + 1114^2 .

It is a cyclic number.

It is not a de Polignac number, because 1113130021 - 2¹ = 1113130019 is a prime.

Together with 1113130019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1113129983 and 1113130010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1113130001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556565010 + 556565011.

It is an arithmetic number, because the mean of its divisors is an integer number (556565011).

Almost surely, 2^1113130021 is an apocalyptic number.

It is an amenable number.

1113130021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1113130021 is an equidigital number, since it uses as much as digits as its factorization.

1113130021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1113130021 is about 33363.6032376600. The cubic root of 1113130021 is about 1036.3711113256.

Adding to 1113130021 its reverse (1200313111), we get a palindrome (2313443132).

The spelling of 1113130021 in words is "one billion, one hundred thirteen million, one hundred thirty thousand, twenty-one".