11101031221 has 8 divisors (see below), whose sum is σ = 12693041280. Its totient is φ = 9510558288.

The previous prime is 11101031209. The next prime is 11101031239. The reversal of 11101031221 is 12213010111.

It is a happy number.

11101031221 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 not a de Polignac number, because 11101031221 - 2¹³ = 11101023029 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 (11101031261) 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, 368761 + ... + 397726.

It is an arithmetic number, because the mean of its divisors is an integer number (1586630160).

Almost surely, 2^11101031221 is an apocalyptic number.

It is an amenable number.

11101031221 is a deficient number, since it is larger than the sum of its proper divisors (1592010059).

11101031221 is an equidigital number, since it uses as much as digits as its factorization.

11101031221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768563.

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

Adding to 11101031221 its reverse (12213010111), we get a palindrome (23314041332).

The spelling of 11101031221 in words is "eleven billion, one hundred one million, thirty-one thousand, two hundred twenty-one".