11112113221 has 8 divisors (see below), whose sum is σ = 12135681504. Its totient is φ = 10090774320.

The previous prime is 11112113183. The next prime is 11112113231. The reversal of 11112113221 is 12231121111.

It is a happy number.

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

It is not a de Polignac number, because 11112113221 - 2¹⁵ = 11112080453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11112113195 and 11112113204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11112113231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 546910 + ... + 566863.

It is an arithmetic number, because the mean of its divisors is an integer number (1516960188).

Almost surely, 2^11112113221 is an apocalyptic number.

11112113221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11112113221 is a deficient number, since it is larger than the sum of its proper divisors (1023568283).

11112113221 is a wasteful number, since it uses less digits than its factorization.

11112113221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1114691.

The product of its digits is 24, while the sum is 16.

Adding to 11112113221 its reverse (12231121111), we get a palindrome (23343234332).

The spelling of 11112113221 in words is "eleven billion, one hundred twelve million, one hundred thirteen thousand, two hundred twenty-one".