11121221011 has 8 divisors (see below), whose sum is σ = 11247307904. Its totient is φ = 10995367680.

The previous prime is 11121221003. The next prime is 11121221029. The reversal of 11121221011 is 11012212111.

It is a happy number.

11121221011 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 11121221011 - 2³ = 11121221003 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11121220982 and 11121221000.

It is not an unprimeable number, because it can be changed into a prime (11121221081) 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, 38281 + ... + 153973.

It is an arithmetic number, because the mean of its divisors is an integer number (1405913488).

Almost surely, 2^11121221011 is an apocalyptic number.

11121221011 is a deficient number, since it is larger than the sum of its proper divisors (126086893).

11121221011 is an equidigital number, since it uses as much as digits as its factorization.

11121221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116781.

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

Adding to 11121221011 its reverse (11012212111), we get a palindrome (22133433122).

The spelling of 11121221011 in words is "eleven billion, one hundred twenty-one million, two hundred twenty-one thousand, eleven".