123323112131 has 4 divisors (see below), whose sum is σ = 123371686200. Its totient is φ = 123274538064.

The previous prime is 123323112113. The next prime is 123323112137. The reversal of 123323112131 is 131211323321.

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 123323112131 - 2¹⁸ = 123322849987 is a prime.

It is a super-2 number, since 2×123323112131² (a number of 23 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 = 123323112097 and 123323112106.

It is not an unprimeable number, because it can be changed into a prime (123323112137) 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, 24283226 + ... + 24288303.

It is an arithmetic number, because the mean of its divisors is an integer number (30842921550).

Almost surely, 2^123323112131 is an apocalyptic number.

123323112131 is a deficient number, since it is larger than the sum of its proper divisors (48574069).

123323112131 is an equidigital number, since it uses as much as digits as its factorization.

123323112131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48574068.

The product of its digits is 648, while the sum is 23.

Adding to 123323112131 its reverse (131211323321), we get a palindrome (254534435452).

The spelling of 123323112131 in words is "one hundred twenty-three billion, three hundred twenty-three million, one hundred twelve thousand, one hundred thirty-one".