11111232211 has 4 divisors (see below), whose sum is σ = 11251880800. Its totient is φ = 10970583624.

The previous prime is 11111232199. The next prime is 11111232227. The reversal of 11111232211 is 11223211111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11223211111 = 7 ⋅1603315873.

It is a cyclic number.

It is not a de Polignac number, because 11111232211 - 2³³ = 2521297619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11111232241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70324176 + ... + 70324333.

It is an arithmetic number, because the mean of its divisors is an integer number (2812970200).

Almost surely, 2^11111232211 is an apocalyptic number.

11111232211 is a deficient number, since it is larger than the sum of its proper divisors (140648589).

11111232211 is an equidigital number, since it uses as much as digits as its factorization.

11111232211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140648588.

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

Adding to 11111232211 its reverse (11223211111), we get a palindrome (22334443322).

The spelling of 11111232211 in words is "eleven billion, one hundred eleven million, two hundred thirty-two thousand, two hundred eleven".