11101001221 has 8 divisors (see below), whose sum is σ = 11588583744. Its totient is φ = 10613829600.

The previous prime is 11101001189. The next prime is 11101001273. The reversal of 11101001221 is 12210010111.

11101001221 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 11101001221 - 2⁵ = 11101001189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11101001198 and 11101001207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101001291) 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, 46855 + ... + 156196.

It is an arithmetic number, because the mean of its divisors is an integer number (1448572968).

Almost surely, 2^11101001221 is an apocalyptic number.

It is an amenable number.

11101001221 is a deficient number, since it is larger than the sum of its proper divisors (487582523).

11101001221 is a wasteful number, since it uses less digits than its factorization.

11101001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205451.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 11101001221 its reverse (12210010111), we get a palindrome (23311011332).

The spelling of 11101001221 in words is "eleven billion, one hundred one million, one thousand, two hundred twenty-one".