11213011021 has 4 divisors (see below), whose sum is σ = 11240974044. Its totient is φ = 11185048000.

The previous prime is 11213011013. The next prime is 11213011031. The reversal of 11213011021 is 12011031211.

It is a happy number.

11213011021 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.

It can be written as a sum of positive squares in 2 ways, for example, as 7817035396 + 3395975625 = 88414^2 + 58275^2 .

It is a cyclic number.

It is not a de Polignac number, because 11213011021 - 2³ = 11213011013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11213010992 and 11213011010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11213011031) 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, 13980910 + ... + 13981711.

It is an arithmetic number, because the mean of its divisors is an integer number (2810243511).

Almost surely, 2^11213011021 is an apocalyptic number.

It is an amenable number.

11213011021 is a deficient number, since it is larger than the sum of its proper divisors (27963023).

11213011021 is an equidigital number, since it uses as much as digits as its factorization.

11213011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27963022.

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

Adding to 11213011021 its reverse (12011031211), we get a palindrome (23224042232).

The spelling of 11213011021 in words is "eleven billion, two hundred thirteen million, eleven thousand, twenty-one".