11112332221 has 4 divisors (see below), whose sum is σ = 11112995232. Its totient is φ = 11111669212.

The previous prime is 11112332219. The next prime is 11112332227. The reversal of 11112332221 is 12223321111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11112332221 - 2¹ = 11112332219 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 (11112332227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305695 + ... + 340108.

It is an arithmetic number, because the mean of its divisors is an integer number (2778248808).

Almost surely, 2^11112332221 is an apocalyptic number.

It is an amenable number.

11112332221 is a deficient number, since it is larger than the sum of its proper divisors (663011).

11112332221 is an equidigital number, since it uses as much as digits as its factorization.

11112332221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663010.

The product of its digits is 144, while the sum is 19.

Adding to 11112332221 its reverse (12223321111), we get a palindrome (23335653332).

It can be divided in two parts, 1111 and 2332221, that added together give a palindrome (2333332).

The spelling of 11112332221 in words is "eleven billion, one hundred twelve million, three hundred thirty-two thousand, two hundred twenty-one".