11113012021 has 4 divisors (see below), whose sum is σ = 11113451200. Its totient is φ = 11112572844.

The previous prime is 11113011997. The next prime is 11113012037. The reversal of 11113012021 is 12021031111.

It is a happy number.

11113012021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 an emirpimes, since its reverse is a distinct semiprime: 12021031111 = 25633 ⋅468967.

It is a cyclic number.

It is not a de Polignac number, because 11113012021 - 2⁷ = 11113011893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11113011992 and 11113012010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11113012061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179151 + ... + 233068.

It is an arithmetic number, because the mean of its divisors is an integer number (2778362800).

Almost surely, 2^11113012021 is an apocalyptic number.

It is an amenable number.

11113012021 is a deficient number, since it is larger than the sum of its proper divisors (439179).

11113012021 is an equidigital number, since it uses as much as digits as its factorization.

11113012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439178.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 11113012021 its reverse (12021031111), we get a palindrome (23134043132).

The spelling of 11113012021 in words is "eleven billion, one hundred thirteen million, twelve thousand, twenty-one".