11121011221 has 8 divisors (see below), whose sum is σ = 11744349120. Its totient is φ = 10509324672.

The previous prime is 11121011197. The next prime is 11121011233. The reversal of 11121011221 is 12211012111.

It is a happy number.

11121011221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11121011221 - 2¹¹ = 11121009173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121018221) 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 7 ways as a sum of consecutive naturals, for example, 2910876 + ... + 2914693.

It is an arithmetic number, because the mean of its divisors is an integer number (1468043640).

Almost surely, 2^11121011221 is an apocalyptic number.

It is an amenable number.

11121011221 is a deficient number, since it is larger than the sum of its proper divisors (623337899).

11121011221 is an equidigital number, since it uses as much as digits as its factorization.

11121011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5825675.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11121011221 its reverse (12211012111), we get a palindrome (23332023332).

The spelling of 11121011221 in words is "eleven billion, one hundred twenty-one million, eleven thousand, two hundred twenty-one".