11231111231111 has 4 divisors (see below), whose sum is σ = 11593405141824. Its totient is φ = 10868817320400.

The previous prime is 11231111231051. The next prime is 11231111231141. The reversal of 11231111231111 is 11113211113211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11231111231111 - 2⁴² = 6833064720007 is a prime.

It is a super-2 number, since 2×11231111231111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11231111231141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181146955310 + ... + 181146955371.

It is an arithmetic number, because the mean of its divisors is an integer number (2898351285456).

Almost surely, 2^{11231111231111} is an apocalyptic number.

11231111231111 is a deficient number, since it is larger than the sum of its proper divisors (362293910713).

11231111231111 is an equidigital number, since it uses as much as digits as its factorization.

11231111231111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362293910712.

The product of its digits is 36, while the sum is 20.

Adding to 11231111231111 its reverse (11113211113211), we get a palindrome (22344322344322).

The spelling of 11231111231111 in words is "eleven trillion, two hundred thirty-one billion, one hundred eleven million, two hundred thirty-one thousand, one hundred eleven".