123443142131 has 16 divisors (see below), whose sum is σ = 126642446784. Its totient is φ = 120291462144.

The previous prime is 123443142089. The next prime is 123443142149. The reversal of 123443142131 is 131241344321.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123443142131 is a prime.

It is a super-2 number, since 2×123443142131² (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 = 123443142094 and 123443142103.

It is not an unprimeable number, because it can be changed into a prime (123443142181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2591330 + ... + 2638536.

It is an arithmetic number, because the mean of its divisors is an integer number (7915152924).

Almost surely, 2^123443142131 is an apocalyptic number.

123443142131 is a deficient number, since it is larger than the sum of its proper divisors (3199304653).

123443142131 is a wasteful number, since it uses less digits than its factorization.

123443142131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47710.

The product of its digits is 6912, while the sum is 29.

Adding to 123443142131 its reverse (131241344321), we get a palindrome (254684486452).

The spelling of 123443142131 in words is "one hundred twenty-three billion, four hundred forty-three million, one hundred forty-two thousand, one hundred thirty-one".