11111032221 has 8 divisors (see below), whose sum is σ = 14815197600. Its totient is φ = 7407110832.

The previous prime is 11111032169. The next prime is 11111032237. The reversal of 11111032221 is 12223011111.

11111032221 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 11111032221 - 2⁶ = 11111032157 is a prime.

It is a super-2 number, since 2×11111032221² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11111032221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111032721) 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, 138130 + ... + 203228.

It is an arithmetic number, because the mean of its divisors is an integer number (1851899700).

Almost surely, 2^11111032221 is an apocalyptic number.

It is an amenable number.

11111032221 is a deficient number, since it is larger than the sum of its proper divisors (3704165379).

11111032221 is an equidigital number, since it uses as much as digits as its factorization.

11111032221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121995.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 11111032221 its reverse (12223011111), we get a palindrome (23334043332).

The spelling of 11111032221 in words is "eleven billion, one hundred eleven million, thirty-two thousand, two hundred twenty-one".