11441213021 has 4 divisors (see below), whose sum is σ = 13075672032. Its totient is φ = 9806754012.

The previous prime is 11441213011. The next prime is 11441213039. The reversal of 11441213021 is 12031214411.

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.

It is a cyclic number.

It is not a de Polignac number, because 11441213021 - 2¹⁰ = 11441211997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11441212984 and 11441213002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11441213011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 817229495 + ... + 817229508.

It is an arithmetic number, because the mean of its divisors is an integer number (3268918008).

Almost surely, 2^11441213021 is an apocalyptic number.

It is an amenable number.

11441213021 is a deficient number, since it is larger than the sum of its proper divisors (1634459011).

11441213021 is an equidigital number, since it uses as much as digits as its factorization.

11441213021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1634459010.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 11441213021 its reverse (12031214411), we get a palindrome (23472427432).

The spelling of 11441213021 in words is "eleven billion, four hundred forty-one million, two hundred thirteen thousand, twenty-one".