123442310131 has 8 divisors (see below), whose sum is σ = 143956047200. Its totient is φ = 105807694104.

The previous prime is 123442310119. The next prime is 123442310203. The reversal of 123442310131 is 131013244321.

It is not a de Polignac number, because 123442310131 - 2⁹ = 123442309619 is a prime.

It is a super-2 number, since 2×123442310131² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123442310096 and 123442310105.

It is not an unprimeable number, because it can be changed into a prime (123442310111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179944716 + ... + 179945401.

It is an arithmetic number, because the mean of its divisors is an integer number (17994505900).

Almost surely, 2^123442310131 is an apocalyptic number.

123442310131 is a deficient number, since it is larger than the sum of its proper divisors (20513737069).

123442310131 is an frugal number, since it uses more digits than its factorization.

123442310131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359890138 (or 359890124 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 123442310131 its reverse (131013244321), we get a palindrome (254455554452).

The spelling of 123442310131 in words is "one hundred twenty-three billion, four hundred forty-two million, three hundred ten thousand, one hundred thirty-one".