11231323123 has 4 divisors (see below), whose sum is σ = 11492516728. Its totient is φ = 10970129520.

The previous prime is 11231323097. The next prime is 11231323133. The reversal of 11231323123 is 32132313211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32132313211 = 158527 ⋅202693.

It is a cyclic number.

It is not a de Polignac number, because 11231323123 - 2⁹ = 11231322611 is a prime.

It is a super-2 number, since 2×11231323123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11231323094 and 11231323103.

It is not an unprimeable number, because it can be changed into a prime (11231323133) 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, 130596738 + ... + 130596823.

It is an arithmetic number, because the mean of its divisors is an integer number (2873129182).

Almost surely, 2^11231323123 is an apocalyptic number.

11231323123 is a deficient number, since it is larger than the sum of its proper divisors (261193605).

11231323123 is an equidigital number, since it uses as much as digits as its factorization.

11231323123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261193604.

The product of its digits is 648, while the sum is 22.

Adding to 11231323123 its reverse (32132313211), we get a palindrome (43363636334).

The spelling of 11231323123 in words is "eleven billion, two hundred thirty-one million, three hundred twenty-three thousand, one hundred twenty-three".