123042305131 has 4 divisors (see below), whose sum is σ = 125363858112. Its totient is φ = 120720752152.

The previous prime is 123042305119. The next prime is 123042305149. The reversal of 123042305131 is 131503240321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131503240321 = 37783 ⋅3480487.

It is a cyclic number.

It is not a de Polignac number, because 123042305131 - 2¹³ = 123042296939 is a prime.

It is a super-2 number, since 2×123042305131² (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 = 123042305096 and 123042305105.

It is not an unprimeable number, because it can be changed into a prime (123042305171) 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, 1160776411 + ... + 1160776516.

It is an arithmetic number, because the mean of its divisors is an integer number (31340964528).

Almost surely, 2^123042305131 is an apocalyptic number.

123042305131 is a deficient number, since it is larger than the sum of its proper divisors (2321552981).

123042305131 is an equidigital number, since it uses as much as digits as its factorization.

123042305131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2321552980.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 123042305131 its reverse (131503240321), we get a palindrome (254545545452).

The spelling of 123042305131 in words is "one hundred twenty-three billion, forty-two million, three hundred five thousand, one hundred thirty-one".