11111121233 has 4 divisors (see below), whose sum is σ = 11157611520. Its totient is φ = 11064630948.

The previous prime is 11111121211. The next prime is 11111121247. The reversal of 11111121233 is 33212111111.

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 11111121233 - 2²⁰ = 11110072657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11111127233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23244785 + ... + 23245262.

It is an arithmetic number, because the mean of its divisors is an integer number (2789402880).

Almost surely, 2^11111121233 is an apocalyptic number.

It is an amenable number.

11111121233 is a deficient number, since it is larger than the sum of its proper divisors (46490287).

11111121233 is an equidigital number, since it uses as much as digits as its factorization.

11111121233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46490286.

The product of its digits is 36, while the sum is 17.

Adding to 11111121233 its reverse (33212111111), we get a palindrome (44323232344).

The spelling of 11111121233 in words is "eleven billion, one hundred eleven million, one hundred twenty-one thousand, two hundred thirty-three".