11331211231123 has 4 divisors (see below), whose sum is σ = 12949955692720. Its totient is φ = 9712466769528.

The previous prime is 11331211231031. The next prime is 11331211231157. The reversal of 11331211231123 is 32113211213311.

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 11331211231123 - 2⁴¹ = 9132187975571 is a prime.

It is a super-2 number, since 2×11331211231123² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11331211231183) 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, 809372230788 + ... + 809372230801.

It is an arithmetic number, because the mean of its divisors is an integer number (3237488923180).

Almost surely, 2^{11331211231123} is an apocalyptic number.

11331211231123 is a deficient number, since it is larger than the sum of its proper divisors (1618744461597).

11331211231123 is an equidigital number, since it uses as much as digits as its factorization.

11331211231123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618744461596.

The product of its digits is 648, while the sum is 25.

Adding to 11331211231123 its reverse (32113211213311), we get a palindrome (43444422444434).

The spelling of 11331211231123 in words is "eleven trillion, three hundred thirty-one billion, two hundred eleven million, two hundred thirty-one thousand, one hundred twenty-three".