23123231311 has 4 divisors (see below), whose sum is σ = 23124098800. Its totient is φ = 23122363824.

The previous prime is 23123231293. The next prime is 23123231357. The reversal of 23123231311 is 11313232132.

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 23123231311 - 2¹⁵ = 23123198543 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23123231371) 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, 392451 + ... + 447508.

It is an arithmetic number, because the mean of its divisors is an integer number (5781024700).

Almost surely, 2^23123231311 is an apocalyptic number.

23123231311 is a deficient number, since it is larger than the sum of its proper divisors (867489).

23123231311 is an equidigital number, since it uses as much as digits as its factorization.

23123231311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867488.

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

Adding to 23123231311 its reverse (11313232132), we get a palindrome (34436463443).

The spelling of 23123231311 in words is "twenty-three billion, one hundred twenty-three million, two hundred thirty-one thousand, three hundred eleven".