11231320123111 has 16 divisors (see below), whose sum is σ = 12435095635200. Its totient is φ = 10058699326720.

The previous prime is 11231320123097. The next prime is 11231320123147. The reversal of 11231320123111 is 11132102313211.

It is not a de Polignac number, because 11231320123111 - 2²⁷ = 11231185905383 is a prime.

It is a super-2 number, since 2×11231320123111² (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 (11231320123181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17102011 + ... + 17746588.

It is an arithmetic number, because the mean of its divisors is an integer number (777193477200).

Almost surely, 2^{11231320123111} is an apocalyptic number.

11231320123111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11231320123111 is a deficient number, since it is larger than the sum of its proper divisors (1203775512089).

11231320123111 is a wasteful number, since it uses less digits than its factorization.

11231320123111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34849046.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 11231320123111 its reverse (11132102313211), we get a palindrome (22363422436322).

The spelling of 11231320123111 in words is "eleven trillion, two hundred thirty-one billion, three hundred twenty million, one hundred twenty-three thousand, one hundred eleven".