123320310131 has 4 divisors (see below), whose sum is σ = 123520181592. Its totient is φ = 123120438672.

The previous prime is 123320310119. The next prime is 123320310143. The reversal of 123320310131 is 131013023321.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (123320310119) and next prime (123320310143).

It is a cyclic number.

It is not a de Polignac number, because 123320310131 - 2¹⁰ = 123320309107 is a prime.

It is a super-2 number, since 2×123320310131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123320310101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99934805 + ... + 99936038.

It is an arithmetic number, because the mean of its divisors is an integer number (30880045398).

Almost surely, 2^123320310131 is an apocalyptic number.

123320310131 is a deficient number, since it is larger than the sum of its proper divisors (199871461).

123320310131 is an equidigital number, since it uses as much as digits as its factorization.

123320310131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199871460.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 123320310131 its reverse (131013023321), we get a palindrome (254333333452).

The spelling of 123320310131 in words is "one hundred twenty-three billion, three hundred twenty million, three hundred ten thousand, one hundred thirty-one".